18 



Heterocenlrolm mamillalus (Klein); reared to first larval stage 

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

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

 Dendrastcr excenlricus (Esch.); reared to full larval shape. 

 Astriclypeus manni Verrill; reared through metamorphosis. 

 Encope micropora Agass. ; reared to full larval shape. 

 Mellita 6-perforala (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. 



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

 Astropecten poly acanthus M. & Tr. ; reared to young Bipinnaria. 

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

 Asterina regularis Verr. ; reared to young Bipinnaria. 

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

 Ophidiasler Guildingii (iray; reared to beginning larva. 

 Asteria.i calamaria Gray; reared to beginning larva. 

 Pisaster ochraceus (Brandt); reared to young Bipinnaria. 

 Euasteriaa Troscheli (Slimpson); reared to young Bipinnaria. 

 Orthasterias leplolena Verrill; reared to young Bipinnaria. 

 Pycnopodia helianthoides (Brandt); reared to beginning larva. 



Ophiolhri.v ungulala Say (Var.); reared to young Pluteus. 

 Ophionereis squamulosa Koehler; reared through metamorphosis. 

 Ophionoliif! he.vactis (E. A. Smith); larva described 1 ). 



Slicliopus californicm (Stimps.); reared to full larval shape. 

 Slichopm Kefersleinii 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 certainty, 

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

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

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



*) In spite of being viviparous this species has a very well formed larva; there is then 

 reason to name this species also in this list. 



