18 



Heterocentrotus mamillatus (Klein); reared to first larval stage 

 Arachnoides placenta (Linn.); reared to full larval shape. 

 Echinarachnius mirabilis Agass. ; reared only to the gastrula stage. 

 Dendraster excentricus (Esch.); reared to full larval shape. 

 Astriclypeus manni Verrill; reared through metamorphosis. 

 Encope micropora Agass.; reared to full larval shape. 

 Mellita 6-perforata (Leske); reared through metamorphosis. 

 Clypeaster japonicus Doderl. ; reared to nearly full larval shape. 

 Laganum diplopora H. L. Clark; reared to first larval stage. 

 Echinobrissus (Oligopodia) recens (M. Edw.); reared to full larval shape. 

 Brissus Agassizi Doderl.; reared to first larval stage. 

 Brissus obesus Verrill; reared to first larval stage. 

 Meoma grandis Gray; reared to first larval stage. 

 Echinocardium australe Gray; reared to nearly full larval stage. 



Astropeden scoparius M. & Tr. ; reared to metamorphosis. 

 Astropeden polyacanthus M. & Tr. ; reared to young Bipinnaria. 

 Asterina pedinifera (M. & Tr.); reared to full larval shape. 

 Asterina regularis Verr.; reared to young Bipinnaria. 

 Gymnasteria carinifera (Lamk.); reared to young Bipinnaria. 

 Ophidiaster Guildingii Gray; reared to beginning larva. 

 Asterias calamaria Gray; reared to beginning larva. 

 Pisaster ochraceus (Brandt); reared to young Bipinnaria. 

 Euasierias Troscheli (Stimpson); reared to young Bipinnaria. 

 Orthasterias leptolena Verrill; reared to young Bipinnaria. 

 Pycnopodia helianthoides (Brandt); reared to beginning larva. 



Ophiothrix angulata Say (Var.); reared to young Pluteus. 

 Ophionereis squamulosa Koehler; reared through metamorphosis. 

 Ophionotus hexadis (E. A. Smith); larva described i). 



Stichopus calif ornicus (Stimps.); reared to full larval shape. 

 Stichopus Kefersteinii Sel.; reared to young Auricularia. 



While thus hitherto the development has been studied, more or less 

 completely, or the pelagic larvae identified, with more or less certaintv 

 of m all 70 Echinoderms, excluding the viviparous forms (several of them 

 bemg reared or the larvae identified by the present author), there are 

 given m the present work descriptions of the larval development, more 



