120 THE DEPTHS OF THE SEA. [chap. ui. 



Asteropsls pidviUus, O. F. Muller, were not met 

 with beyond the 100-fathom line. A curious little 

 group of cushion stars, hitherto supposed to be con- 

 fined to higli latitudes, were represented by Fteraster 

 ■militaris, M. and T., and P. pulvillus, Sars, and by 

 two forms new to science, — one, Korethraster his- 

 pidus, sp. n., with the whole of the upper surface 

 covered with long free pa-xillse like sable brushes (Eig. 

 15). Ranges of delicate spatulate spines border the 



F[f). 16. —//yHieiiflA^c/- 2>e!iitcidiwt, Wyville Thomson. Ventral a.spect. Natural size. (Ko. 59) 



ambulacral grooves. As in Pteraster, there is a double 

 row of conical water feet. The other genus (Pig. 16) 

 is perhaps even more remarkable. The star-fish is 

 very flat, the dorsal surface covered with short paxillaj 

 which support a membrane as in Tier aster. A I'ow 

 of spines fringing the ambulacral grooves is greatly 

 lengthened and webbed, and the web running along 

 the side of one arm meets and unites with the web 



