ECHINOIDEA. II. 



189 



Clypeaster subdepressus 



Echinanthus rosaceus 

 Echinarachnius parma 



Mellita sexforis 

 Neolampas rostellata 

 Echinolampas depressa 

 Conolampas Sigsbei 

 Rhyncopygus caribbsearum 

 Urechiuus naresianus 

 Ponrtalesia miranda 

 — Wandeli 



Aeropsis rostrata 

 Aceste bellidifera 

 Pakeotropus Josephinse 

 Tlionisoni 

 Homolampas fragilis 

 Palteopneustes cristatus 



— hystrix 



Linopneustes longispinus 

 Palseobrissus Hilgardi 

 Hemiaster expergitus (Mentzi) 

 Agfassizia excentrica 



Pcriaster 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- 

 gyloeeutrolus drobachicnsis 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 caribba-arum, Metalia pectoralis, Meoma ven- 

 tricosa and Brissus unicolor. The same probably holds good for Psammechinus varicgatus, Tripneustes 

 esculentus, Echinometra lucuittcr and Mellita sexforis. Of the rest the following species are known 

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



Dorocidaris papillata 

 Cidaris affinis 

 Stereocidaris iugolfiana 

 Phormosoma placenta 

 Calveria hystrix 

 Araeosoma fenestratum 

 Hygrosoma Petersi 

 Dermatodiadema antillarum 

 Salenia hasti°;era 



Trigonocidaris albida 

 Genocidaris maculata 

 Echinus elegans 



— Alexaudri 



— affinis 

 Echinocyamus grandiporus 

 Clypeaster subdepressus 

 Neolampas rostellata 



Urechinus naresianus 

 Ponrtalesia Wandeli 

 Aceste bellidifera 

 Homolampas fragilis 

 Hemiaster expergitus 

 Brisaster fragilis 

 Brissus Damesi 

 Brissopsis atlantica (?). 



Further two species, Salenia Pattcrsoni and Cocloplcurus floridanus, 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-; 



Dorocidaris abyssicola 

 Blakei 



— micans 

 Tretocidaris Bartletti 

 Histocidaris Sharreri 

 Arseosoma Belli 

 Tromikosoma Koehleri 

 Aspidodiadema Jacobyi 

 Hemipediua cubensis 

 Podocidaris scutata 



— sculpta 



Salenia goesiana 

 — varispina 

 Echinus gracilis 

 Pygastrides relictus 

 Clypeaster latissimus 

 Echinolampas depressa 

 Conolampas Sigsbei 

 Pourtalesia miranda 

 Aeropsis rostrata 

 Palseotropus Josephinse 

 Thomsoni 



Paleeopneustes cristatus 



hystrix 

 Linopneustes longispinus 

 Palaeobrissus Hilgardi 

 Agassizia excentrica 

 Periaster limicola 

 Schizaster orbignyanus 

 Macropneustes spatangoides 

 Rhinobrissus micrasterioides 

 Brissopsis alta. 







