120 THE DEPTHS OF THE SEA. [CHAP. in. 



Asteropsis pulvillus, O. P. MULLER, were not met 

 with beyond the 100-fathom line. A curious little 

 group of cushion stars, hitherto supposed to he con- 

 fined to high latitudes, were represented by Pteraster 

 militaris, M. and T., and P. putvillus, SARS, and by 

 two forms new to science, one, Koreth raster his- 

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

 covered with long free paxillse like sable brushes (Eig. 

 15). Ranges of delicate spatulate spines border the 



Fro. 16. Hym er, aster pellucidus, WYVILLE THOMSON. Ventral aspect. Natural size. iNo. 59 ) 



ambulacral grooves. As in Pteraster, there is a double 

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

 is perhaps even more remarkable. The star-fish is 

 very flat, the dorsal surface covered with short paxillse 

 which support a membrane as in Pteraster. A row 

 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 



