ECHINOIDEA. II. 



189 



Clypeaster subdepressus 

 Echinanthus rosaceus 

 Echinarachnius parraa 

 Mellita sexforis 

 Neolampas rostellata 

 Echinolampas depressa 

 Conolampas Sigsbei 

 Rhyncopygus caribbsearum 

 Urechinus naresianus 

 Pourtalesia miranda 

 Wandeli 



Aeropsis rostrata 

 Aceste bellidifera 

 Palseotropus Josephinse 

 Thomsoni 



Homolampas fragilis 

 Palseopneustes cristatus 



hystrix 



Linopneustes longispinus 

 Paleeobrissus Hilgardi 

 Hemiaster expergitus (Mentzi) 

 Agassizia excentrica 



Periaster limicola 

 Brisaster fragilis 

 Schizaster orbignyanus 

 Macropneustes spatangoides 

 Brissus unicolor 

 Damesi 

 Metalia pectoralis 

 Meoma ventricosa 

 Rhinobrissus micrasterioides 

 Brissopsis alta 



atlantica. 



Of these species two may be eliminated as intruders from the Arctic littoral region, viz. Stron- 

 gylocentrotus drobachiensis and Echinarachnius parma, while some other species are only occasional 

 visitors from the littoral region, viz. Cidaris tribuloides, Diadcma antillarum, Arbacia punctulata, Cly- 

 peaster subdepressus, Echinanthus rosaceus, Rhyncopygus caribbcearum, Metalia pectoralis, Meoma ven- 

 tricosa and Brissus unicolor. The same probably holds good for Psammechimis variegatus, Tripneustes 

 esculcntits, Echinomctra lucunter and Mellita sexforis. Of the rest the following species are known 

 also from the European or African side of [the Atlantic: 



Trigonocidaris albida 

 Genocidaris maculata 

 Echinus elegans 

 Alexandri 



affinis 



Echinocyamus grandiporus 

 Clypeaster subdepressus 

 Neolampas rostellata 



Dorocidaris papillata 

 Cidaris affinis 

 Stereocidaris ingolfiana 

 Phormosoma placenta 

 Calveria hystrix 

 Arasosoma fenestratum 

 Hygrosoma Petersi 

 Dermatodiadema antillarum 

 Salenia hastigera 



Further two species, Salenia Pattcrsoni and Coclopleurus Jloridanus, are known also from the 

 South African Sea, and one, Aspidodiadema tonsum, occurs also in the Pacific. 



The remaining 32 species are known only from this region (and partly from the East American 

 littoral region, which cannot be sharply limited against the deep-sea region). These species are the 

 following : 



Urechinus naresianus 

 Pourtalesia Wandeli 

 Aceste bellidifera 

 Homolampas fragilis 

 Hemiaster expergitus 

 Brisaster fragilis 

 Brissus Damesi 

 Brissopsis atlantica (?). 



Dorocidaris abyssicola 

 Blakei 

 micans 



Tretocidaris Bartletti 

 Histocidaris Sharreri 

 Arseosoma Belli 

 Tromikosoma Koehleri 

 Aspidodiadema Jacobyi 

 Hemipedina cubensis 

 Podocidaris scutata 

 sculpta 



Salenia goesiana 

 varispina 

 Echinus gracilis 

 Pygastrides relictus 

 Clypeaster latissimus 

 Echinolampas depressa 

 Conolampas Sigsbei 

 Pourtalesia miranda 

 Aeropsis rostrata 

 Palceotropus Josephine 

 Thomsoni 



Palseopneustes cristatus 



hystrix 



Linopneustes longispinus 

 Palseobrissus Hilgardi 

 Agassizia excentrica 

 Periaster limicola 

 Schizaster orbignyanus 

 Macropneustes spatangoides 

 Rhinobrissus micrasterioides 

 Brissopsis alta. 



