CHARACTERISTIC DEEP-SEA TYPES. - - STARFISHES. 



103 



novelties described by Perrier, the species of Goniopecten reveal 

 many points of similarity in the structure of Pentagonaster (Fig. 

 377), Archaster (Fig. 378), and Astropecten, which were all 

 supposed to be radically distinct. The 

 genus Anthenoides (Fig. 379) is interme- 

 diate between Anthenea, with large pedi- 

 cellarise, and Peutagonaster, with smaller 

 ones and granules. Ctenaster (Fig. 380), 

 on the other hand, recalls a gigantic Cte- 

 nodiscus without ventral scales ; its mar- 

 ginal plates ally it to the Goniasteridse, and 



f, "V ., j i i i , i Fig. 378. Archaster pul- 



the structure ot its dorsal skeleton to such * cher ^ (p er rier.) 

 genera as Solaster and Acanthaster. Ra- 



diaster (Fig. 381), a large five -armed starfish, with bunches 

 of spines like Solaster endeca, of which it possesses the mar- 



Fig-. 879. Anthenoides Peircei. \. (Perrier. } 



