E.EPORT ON THE ECHINOIDEA. 



277 



We find extending into the Southern Ocean, that most characteristic of the abyssal 

 realms, Goniocidaris canalicxdata and Hemiaster cavernosus, or, perhaps better, we find 

 them cropping out at the Cape, Australia, and the southern extremity of South America ; 

 along with Echinus magellanicus and Echinus margaritaceus. The only new littoral 

 species is Schizaster moseleyi, while it is interesting to find that all the other deep-sea 

 species belong without exception to the Pourtalesise. Of the deep-sea species Pourtalesia 

 phiale is the only one which finds its way into the northern Atlantic as far as Europe in 

 deep water. A comparatively large number of species of Antarctic Pourtalesise and 

 South Pacific Echinothuridse find their way northward into the Pacific. 



