PLATE 118.Medusettida.Diam.Page.Fig. 1.Gazelletta melusina, n. sp.,×3001674From the peristome of the thorny campanulate shell arise six large descending feet, which are studded with arborescent fragile lateral branches, and armed at the distal end with stouter dichotomous terminal branches.Fig. 2.Euphysetta staurocodon, n. sp.,×3001670The peristome of the ovate shell bears an odd large foot with three terminal branches and three cruciate rudimentary feet. In the upper part of the shell-cavity is visible the sphæroidal central capsule (containing a nucleus of half the size, with numerous nucleoli); in the lower half the dark pigment-masses of the green phæodium.Fig. 3.Euphysetta amphicodon, n. sp.,×3001670The shell-wall exhibits the regular alveolate structure. From the mouth are prominent large masses of the phæodium, which is more voluminous than the shell-cavity, and seems to contain nucleated cells.Plate 118.
Fig. 1.Gazelletta melusina, n. sp.,
Plate 118.
PLATE119.
Legion PHÆODARIA.
Order PHÆOGROMIA.
FamilyMedusettida.
Fig. 1.Gorgonetta mirabilis, n. sp.,
PLATE 119.Medusettida.Diam.Page.Fig. 1.Gorgonetta mirabilis, n. sp.,×1001674The entire body. From the margin of the cap-shaped shell arise six ascending arborescent feet and six alternating descending feet, which are covered with anchor-pencils and branched at the distal end. From the mouth of the delicately alveolate shell depend prominent parts of the dark voluminous phæodium.Fig. 2.Gorgonetta mirabilis, n. sp.,×3001674The distal end of an ascending foot; the branches bear a terminal spathilla with small recurved teeth.Fig. 3.Gorgonetta mirabilis, n. sp.,×3001674The distal end of a descending foot, with three lateral anchor-pencils and three terminal branches (broken off). Odd alveole contains an air-bubble.Fig. 4.Gorgonetta mirabilis, n. sp.,×6001674A single thread of an anchor-pencil with two quadridentate spathillæ, a larger proximal and a smaller distal (terminal).Plate 119.
Fig. 1.Gorgonetta mirabilis, n. sp.,
Plate 119.
PLATE120.
Legion PHÆODARIA.
Order PHÆOGROMIA.
FamilyMedusettida.
Fig. 1.Medusetta codonium, n. sp.,
PLATE 120.Medusettida.Diam.Page.Fig. 1.Medusetta codonium, n. sp.,×4001668Fig. 2.Medusetta quadrigata, n. sp.,×4001668The central capsule is visible in the upper half, the phæodium in the lower half of the shell-cavity.Fig. 3.Medusetta tetranema, n. sp.,×4001669Fig. 4.Medusetta craspedota, n. sp.,×4001669Fig. 5.Gazelletta hexanema, n. sp.,×3001671Fig. 6.Gazelletta bifurca, n. sp.,×3001672A single alveolate foot.Fig. 7.Gazelletta macronema, n. sp.,×2001671Oral view of the shell.Fig. 8.Gazelletta macronema, n. sp.,×8001671Three joints of an alveolate foot.Fig. 9.Gazelletta cyrtonema, n. sp.,×3001671The upper part of the shell encloses the central capsule with its nucleus. The voluminous phæodium is prominent over the mouth.Fig. 10.Gazelletta orthonema, n. sp.,×2001671The central capsule and its nucleus are visible in the shell-cavity.Fig. 11.Gazelletta schleinitzii, n. sp.,×4001673Oblique apical view, with the enclosed central capsule, the nucleus of which contains numerous nucleoli.Fig. 12.Gazelletta schleinitzii, n. sp.,×3001673A single alveolate foot.Fig. 13.Gazelletta trispathilla, n. sp.,×4001673The middle part of a foot.Fig. 14.Gazellatta robusta, n. sp.,×3001673The base of a foot, exhibiting the pores of the alveoli.Fig. 15.Gazelletta studeri, n. sp.,×4001673The distal end of a foot; four alveoli filled up by air-bubbles.Fig. 16.Gazelletta dendronema, n. sp.,×3001674A part of the velum, seen from the inside. The alveoles are partly filled by air.Plate 120.
Fig. 1.Medusetta codonium, n. sp.,
Plate 120.
PLATE121.
Legion PHÆODARIA.
Order PHÆOCONCHIA.
FamilyCœlodendrida.
Fig. 1.Cœlodendrum furcatissimum, n. sp.,
PLATE 121.Cœlodendrida.Diam.Page.Fig. 1.Cœlodendrum furcatissimum, n. sp.,×501735A complete specimen with the central capsule and the big phæodium. The spherical calymma envelops almost the entire skeleton.Fig. 2.Cœlodendrum furcatissimum, n. sp.,×3001735A distal branch with its terminal ramification.Fig. 3.Cœlodendrum furcatissimum, n. sp.,×1001735One valve of the shell, with its galea and the four hollow forked tubes arising from it.Fig. 4.Cœlodendrum furcatissimum, n. sp.,×1001735The central capsule with its nucleus; on the left side one valve of the closely enveloping shell (seen in vertical section), and its galea with the origin of the four tubes.Fig. 5.Cœlodendrum serratum, n. sp.,×4001737A flabellate terminal branch.Fig. 6.Cœlodendrum flabellatum, n. sp.,×1501737A flabellate terminal branch.Fig. 7.Cœlodendrum spinosissimum, n. sp.,×3001735Forked distal end of a terminal branch.Fig. 8.Cœlodendrum cervicorne, n. sp.,×1501736One valve of the shell, with its galea and the four tubes arising from it. A network of protoplasm connects the distal branches.Fig. 9.Cœlodrymus ancoratus, n. sp.,×501738A complete specimen, with the central capsule and the enveloping phæodium. The surface of the spherical calymma is covered by a dense network, from which arise numerous, anchor-bearing, radial tubules.Fig. 10.Cœlodrymus ancoratus, n. sp.,×1501738A small piece of the superficial network of the skeleton, with the zigzag radial tubules arising from it, each of which bears an anchor with two recurved denticulate teeth on the distal end.Plate 121.
Fig. 1.Cœlodendrum furcatissimum, n. sp.,
Plate 121.
PLATE122.
Legion PHÆODARIA.
Order PHÆOCONCHIA.
FamilyCœlographida.
Fig. 1.Cœlotholus octonus, n. sp.,
PLATE 122.Cœlographida.Diam.Page.Fig. 1.Cœlotholus octonus, n. sp.,×301749The entire bivalved shell, seen obliquely from the dorsal and somewhat from the right side, enveloped by the yellowish calymma.Fig. 2.Cœlotholus octonus, n. sp.,×1001749One valve of the shell (h) with its large galea and the origin of the three styles. The base of the two lateral styles (g1,g2) is connected by two latticed lateral frenula (b1,b2) with the mouth (m) of the rhinocanna (t). The odd style (g3) is free.Fig. 3.Cœlothauma duodenum, n. sp.,×201750The entire shell, seen from the dorsal side. The long styles are enveloped by the yellowish calymma.Fig. 4.Cœlothauma duodenum, n. sp.,×801750One valve of the shell (h), seen from the apical side;t, rhinocanna;m, its mouth;b1,b2, the two lateral frenula;g1,g2, the two paired styles;g3, the odd style.Fig. 5.Cœlothauma duodenum, n. sp.,×801750One valve of the shell, seen in profile. Characters as in fig. 4.Fig. 6.Cœlothamnus bivalvis, n. sp.,×301751The entire shell, enveloped by the yellowish calymma, seen from the left side; between the two valves is the central capsule, with nucleus and astropyle.Fig. 7.Cœlothamnus bivalvis, n. sp.,×1001751A single lateral anchor-pencil.Fig. 8.Cœlothamnus bivalvis, n. sp.,×2001751Distal end of a style, with its anchor-pencils.Fig. 9.Cœlothamnus bivalvis, n. sp.,×4001751A single anchor-thread, with its quadridentate terminal spathilla.Plate 122.
Fig. 1.Cœlotholus octonus, n. sp.,
Plate 122.
PLATE123.
Legion PHÆODARIA.
Order PHÆOCONCHIA.
FamilyConcharida.
(The central capsule is coloured red in the figures of this plate, the phæodium green).
PLATE 123.Concharida.Diam.Page.(The central capsule is coloured red in the figures of this plate, the phæodium green).Fig. 1.Concharium diatomeum, n. sp.,1717Dorsal view. The central capsule (red) exhibits above the anterior tubular main-opening (astropyle), and below the two small posterior lateral openings (right and left parapylæ).Fig. 2.Concharium bivalvum, n. sp.,×1501717Dorsal view. The central capsule is visible in the lower part, the margin of the two valves in the upper part of the figure.Fig. 2aexhibits the two smooth lateral margins of the valves, catching into one another. (Lateral view).Fig. 3.Concharium nucula, n. sp.,1717The dorsal valve alone, seen from the outside.Fig. 4.Concharium bacillarium, n. sp.,1718Lateral view from the smooth margin, by which the two valves are united.Fig. 5.Conchasma radiolites, n. sp.,×3001719Lateral view. In the aboral half of the shell-cavity lies the red central capsule, in the oral half the green phæodium.Fig. 6.Conchasma sphærulites, n. sp.,×3001719Lateral view. On the aboral pole the two horns of the hinge.Fig. 7.Conchellium tridacna, n. sp.,×2001720Oblique lateral view (from the right and ventral side).Fig. 7a. Three pores of the same, with their hexagonal frames and six internal denticles,×400Fig. 8.Conchopsis carinata, n. sp.,×1501725Lateral view, from the left side.Fig. 9. Conchopsis lenticula, n. sp.,×1501726Lateral view, from the right side. The two membranes of the central capsule are separated by a wide interval in this and the preceding figure. The nucleus contains numerous nucleoli.Fig. 9a. Two of the peculiar cells, which are contained in the green phæodium in large numbers,×400Plate 123.
(The central capsule is coloured red in the figures of this plate, the phæodium green).
Plate 123.