Open AccessThe development of the calcareous parts of the lantern of Aristotle in echinus miliaris
Author(s) -
D. W. Devanesen
Publication year - 1922
Publication title -
proceedings of the royal society of london. series b, containing papers of a biological character
Language(s) - English
Resource type - Journals
eISSN - 2053-9185
pISSN - 0950-1193
DOI - 10.1098/rspb.1922.0034
Subject(s) - lantern , biology , zoology , chemistry , ring (chemistry) , organic chemistry
This investigation was suggested to me by Prof. E. W. MacBride, F. R. S., to whom my thanks are also due for kindly placing at my disposal two metamorphosing plutei and a considerable number of young imagos ofechinus miliaris , all of them fixed in absolute alcohol. In the year 1892, Lovén (3) made a few observations on the embryonic elements of the calcareous lantern inGoniocidaris canaliculata , a Cidarid with a direct development. He also examined the same structures in two young urchins which, as he himself admits, were of doubtful identity and in a state of bad preservation. In the same year, Théel (7), who was working at the early development of the cake-urchin,Echinocyamus pusillus , described certain early stages of the lantern in the young urchins. After these researches of Lovén and Théel, it appears that no attempts have been made to study the development of the lantern ossicles in greater detail and with closer scrutiny.