ECHINOIDEA. II. 



189 



Clypeaster subdepressus 

 Echinanthus rosaceus 

 Echiuarachnius parma 

 Mellita sexforis 

 Neolampas rostellata 

 Echinolampas depressa 

 Coiiolampas Sigsbei 

 Rhyiicopygus caribbæarutn 

 Urechinus naresianus 

 Pourtalesia miranda 

 — Wandeli 



Aeropsis rostrata 

 Aceste bellidifera 

 Palæotropus Josephinæ 

 — Thoinsoiii 



Homolampas fragilis 

 Palæopneustes cristatus 



— hystrix 



Linopneustes longispimis 

 Palæobrissus Hilgardi 

 Hemiaster expergitus (Meutzi) 

 Agassizia excentrica 



Periaster limicola 

 Brisaster fragilis 

 Schizaster orbignyanus 

 Macropnenstes spatangoides 

 Brissus uiiicolor 

 — Damesi 

 Metalia jDectoralis 

 Meoma ventricosa 

 Rhinobrissus micrasterioides 

 Brissopsis alta 



— atlantica. 



Of tliese species two niay be eliminated as intraders from the Arctic littoral region, viz. Strou- 

 gyloccntrotus drobacluoisis and Ec/iiiiarac/inius parma, while some other sjDecies are only occasional 

 visitors from the littoral region, viz. Cidaris tribidoidcs, Diadciiia antillariiin, Arbacia piincinlata, Cly- 

 peaster subdrpressits, Ec/ii)ia>it/ms rosaceus, Rhyncopygus caribbæantni, Metalia pectoralis, Aleonia ven- 

 tricosa and Brissjcs i/iiicolor. The same probably holds good for Psaninicchin'ii.s variegatus, Tripncnstes 

 esculcntiis, Echinometra lucunter and Mellita sexforis. Of the rest the following species are known 

 also from the European or African side of jthe Atlantic: 



Dorocidaris papillata 

 Cidaris affinis 

 Stereocidaris ingolfiana 

 Phormosoma placenta 

 Calveria hystrix 

 Aræosoma fenestratum 

 Hygrosoma Petersi 

 Dermatodiadema antillarum 

 Salenia hastigera 



Trigonocidaris albida 

 Genocidaris maculata 

 Echinus elegans 



— Alexandri 



— affinis 

 Echinocyamus grandiporus 

 Clypeaster subdepressus 

 Neolampas rostellata 



Urechinus naresianus 

 Pourtalesia Wandeli 

 Aceste bellidifera 

 Homolampas fragilis 

 Hemiaster exj^ergitus 

 Brisaster fragilis 

 Brissus Damesi 

 Brissopsis atlantica (?). 



Further two species, Salenia Pattersoi/i and Coelopleiirus floridamis, are known also from the 

 South African Sea, and one, Aspidodiadema toiisnin, 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 

 Aræosoma Belli 

 Tromikosoma Koehleri 

 Aspidodiadema Jacobyi 

 Hemipedina cubensis 

 Podocidaris scutata 



— sculpta 



Salenia goésiana 

 — varispina 

 Echinus gracilis 

 Pygastrides relictus 

 Clypeaster latissimus 

 Echinolampas depressa 

 Conolampas Sigsbei 

 Pourtalesia miranda 

 Aeropsis rostrata 

 PalæotrojDus Josephinæ 

 — Thomsoni 



Palæoi^neustes cristatus 



— hystrix 



Linopneustes longispinus 

 Palæobrissus Hilgardi 

 Agassizia excentrica 

 Periaster limicola 

 Schizaster orbignyanus 

 Macropnenstes sjiatangoides 

 Rhinobrissus micrasterioides 

 Brissopsis alta. 



