Transcriber's Notes:Obvious printer's errors have been repaired, other inconsistent spellings have been kept, for example inconsistent use of hyphen (e.g. "age-classes" and "age classes") and diacritical mark (e.g. "Zool." and "Zoöl.")
Obvious printer's errors have been repaired, other inconsistent spellings have been kept, for example inconsistent use of hyphen (e.g. "age-classes" and "age classes") and diacritical mark (e.g. "Zool." and "Zoöl.")