PLATE124.
Legion PHÆODARIA.
Order PHÆOCONCHIA.
FamilyConcharida.
Fig. 1.Conchidium terebratula, n. sp.,
PLATE 124.Concharida.Diam.Page.Fig. 1.Conchidium terebratula, n. sp.,×4001721Lateral view, from the left side.Fig. 2.Conchidium terebratula, n. sp.,×8001721A piece of the frontal girdle-fissure, with the teeth of both valves catching into one another.Fig. 3.Conchidium rhynchonella, n. sp.,×2001722Lateral view, from the left side.Fig. 4.Conchidium leptæna, n. sp.,×3001722Girdle-fissure with the teeth, seen from the left side.Fig. 5.Conchidium leptæna, n. sp.,×8001722A single tooth with its base.Fig. 6.Conchidium thecidium, n. sp.,×3001721Lateral view, from the left side. In the oral part of the shell-cavity the dark phæodium, in the aboral part the central capsule with two nuclei (a dorsal and a ventral).Fig. 7.Conchidium argiope, n. sp.,×3001722Oblique oral view (half from the anterior, half from the left side).Fig. 8.Conchidium argiope, n. sp.,×3001722Dorsal valve, from below.Fig. 9.Conchidium argiope, n. sp.,×6001722A piece of the valve margin, with four teeth.Fig. 10.Conchonia diodon, n. sp.,×2001723Lateral view, from the left side. In the anterior part of the shell-cavity the dark phæodium, in the posterior part the central capsule with the nucleus. The two valves are connected at the posterior hinge by a ligament (to the right in the figure).Fig. 11.Conchonia diodon, n. sp.,×4001723Mouth of the shell, with its two lips, seen from the oral pole.Fig. 12.Conchonia diodon, n. sp.,×4001723A piece of the valve-margin, with four teeth.Fig. 13.Conchonia triodon, n. sp.,×3001724Ventral valve, seen from the lower face.Fig. 14.Conchonia triodon, n. sp.,×3001724Dorsal valve, seen from the left side.Fig. 15.Conchoceras caudatum, n. sp.,×3001727Lateral view, from the left side.Fig. 16.Conchoceras cornutum, n. sp.,×2001728Lateral view, from the left side.Plate 124.
Fig. 1.Conchidium terebratula, n. sp.,
Plate 124.
PLATE125.
Legion PHÆODARIA.
Order PHÆOCONCHIA.
FamilyConcharida.
Fig. 1.Conchopsis aspidium, n. sp.,
PLATE 125.Concharida.Diam.Page.Fig. 1.Conchopsis aspidium, n. sp.,×1501726Lateral view, from the left side.Fig. 2.Conchopsis aspidium, n. sp.,×3001726The hinge of another specimen, in which the two valves are connected by a ligament (as in figs. 8 and 9, Pl. 123).Fig. 3.Conchopsis orbicularis, n. sp.,×2001725Lateral view, from the left side.Fig. 4.Conchopsis navicula, n. sp.,×1501727Lateral view, from the right side. In the lower (posterior) half of the figure is visible the central capsule with its dark nucleus, in the upper (anterior) half the phæodium with two broad sagittal wings.Fig. 5.Conchopsis navicula, n. sp.,×4001727Three single pores with their hexagonal external frame and the dilated internal ovate or ampullaceous channel.Fig. 6.Conchopsis navicula, n. sp.,×4001727Hinge of the shell, from the right side.Fig. 7.Conchopsis compressa, n. sp.,×1501725Lateral view from the left side. The triangular central capsule with the dark nucleus is visible.Fig. 8.Conchopsis compressa, n. sp.,×1501725Dorsal view of the upper valve with its keel.Fig. 9.Conchopsis pilidium, n. sp.,×801726The two valves separated and seen obliquely, half from the lateral, half from the internal side. The inner opening of each valve is bordered and partly closed by a broad horizontal velum or diaphragm like the deck of a boat.Plate 125.
Fig. 1.Conchopsis aspidium, n. sp.,
Plate 125.
PLATE126.
Legion PHÆODARIA.
Order PHÆOCONCHIA.
FamilyCœlographida.
Figs. 1-1c.Cœlographis regina, n. sp.,
PLATE 126.Cœlographida.Diam.Page.Figs. 1-1c.Cœlographis regina, n. sp.,1752Fig. 1. Lateral view. The central capsule it visible between the two valves of the inner shell, the galeæ of which are filled by the phæodium,×20Fig. 1a. Dorsal view (somewhat obliquely from the left side). The galeæ appear triangular,×20Fig. 1b. Basal view,×20Fig. 1c. Distal end of a style,×300Figs. 2-2b.Cœlodecas sagittaria, n. sp.,1755Fig. 2. One valve of the shell, seen from the outside,×30Fig. 2a. Distal end of a style,×300Figs. 3-3a.Cœlostylus bisenarius, n. sp.,1756Fig. 3. Lateral view of the bivalved shell. The central capsule is visible between the two valves of the inner shell, the galeæ of which are filled by the phæodium,×20Fig. 3a. Distal end of a style,×300Figs. 4-4a.Cœlagalma mirabile, n. sp.,1759Fig. 4. Dorsal view of the bivalved shell,×30Fig. 4a. Basal view of the bivalved shell,×10Plate 126.
Figs. 1-1c.Cœlographis regina, n. sp.,
Plate 126.
PLATE127.
Legion PHÆODARIA.
Order PHÆOCONCHIA.
FamilyCœlographida.
Fig. 1. Cœloplegma murrayanum, n. sp.,
PLATE 127.Cœlographida.Diam.Page.Fig. 1. Cœloplegma murrayanum, n. sp.,×401757One valve of the bivalved shell, seen from the inside, of the usual ovate form.Fig. 2.Cœloplegma murrayanum, n. sp.,×401757One valve of the bivalved shell, seen from the inside, of the rarer polyhedral form, which may be distinguished as a different species (Cœloplegma tritonis, compare p.1758).h, hemispherical inner valve;g, galea;s, its base.Fig. 3.Cœloplegma murrayanum, n. sp.,×401757The entire shell, seen from the base of the aboral pole (dorsal and ventral valve connected by delicate teeth, catching into one another).Fig. 4.Cœloplegma murrayanum, n. sp.,×1001757h, The two hemispherical inner valves of the shell, seen from the right side;n, the central nucleus inside the central capsule;d, the astropyle;g, the galea;t, the nasal tube, arising from its base;m, its mouth;p, the phæodium, which is partly thrown out by the nasal openings, filling up the galea and nasal tube.Fig. 5.Cœloplegma murrayanum, n. sp.,×2001757h, The two hemispherical inner valves of the shell and the enclosed central capsule, seen from the oral side;d, the radiate operculum of the astropyle, seen in the frontal fissure between the two valves;n, the nucleus;k, the crystals;g, galea;g1-g5, the styles arising from the galea;t, nasal tube;m, mouth of it.Fig. 6.Cœloplegma murrayanum, n. sp.,×6001757Oral part of a central capsule, in profile.o, Opening of the proboscis;d, radiate operculum of the astropyle, which gives rise to the proboscis;e, the outer,i, the inner membrane of the capsule;k, groups of crystals;n, nucleus.Fig. 7.Cœloplegma murrayanum, n. sp.,×10001757Three single groups of crystals, taken from the central capsule.Fig. 8.Cœloplegma murrayanum, n. sp.,×3001757One inner valve of the shell, in profile.h, hemispherical valve; g, galea;g1-g5, the tubes arising from it;t, rhinocanna or nasal tube;m, its mouth;b, frenulum.Fig. 9.Cœloplegma murrayanum, n. sp.,×4001757g, The galea;t, rhinocanna of one inner valve;m, its mouth;p, phæodella filling up both the galea and the mouth of the rhinocanna.g1-g5, the styles arising from the galea;s, sieve-plate, which separates the cavity of the galea from the hemispherical valve (h). View in profile.Fig. 10.Cœloplegma murrayanum, n. sp.,×3001757An anchor-pencil of the outer shell.Fig. 11.Cœloplegma murrayanum, n. sp.,×10001757A single anchor-thread of a pencil.Fig. 12.Cœloplegma murrayanum, n. sp.,×3001757Terminal branches of a style.Fig. 13.Cœloplegma murrayanum, n. sp.,×10001757A single terminal branch of a style.Plate 127.
Fig. 1. Cœloplegma murrayanum, n. sp.,
Plate 127.
PLATE128.
Legion PHÆODARIA.
Order PHÆOCONCHIA.
FamilyCœlographida.
Fig. 1.Cœlospathis ancorata, n. sp.,