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THE VOYAGE OF H.M.S. CHALLENGER. 



The following species having a continental and abyssal range find their way into the 

 South American district : — 



Aspidodiadema microtubercidatum, 



Atlantic and Pacific. 

 Phormosoma asterias, Southern Ocean. 

 Phormosoma hoplacantha „ 



Urechimis naresianus 



Cystechinus vesica, Southern Ocean. 

 Cystechinus ivyvillii „ 



Pourtcdesia carinata „ 



Pourtcdesia ceratopyga ,, 

 Schizaster inoseleyi „ 



Echinus norvegicus is the only European boreal species not hitherto found at the 

 southern extremity of South America collected by the Challenger with a new species of 

 Echinus [E. horridus), all the other species are evidently only northern extensions of 

 the Southern Ocean abyssal species. Schizaster moseleyi is also a more shallow Southern 

 Ocean species. The South American district seems to be like that of the Cape of Good 

 Hope ; it has no species peculiar to itself, and is the meeting ground of the southern 

 limits of the Brazils, Virginia, of the Atlantic, of the Southern Ocean, and of the 

 southern extremity of the Peru- Chili districts. 



Southern Brazil — Eastern Virginia. 



