88 



RCHINODEKMA OF THK TnDTAN MrSETTM, PART VII. 



examination of the type of Bell's " Antedon brcvicirra " shows that it is the same 

 thing as Carpenter's Actinometra distincta. 



COMASTER PARVUS. 

 Coinanter paivns l'J09. A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, p. 144. 

 Description.— Cirri XIII-XVIII, lo^ll. s mm. long, arranged in a single 

 or partially double row on a rather thick di:icoidal centrodorsal. 



Fig. 3. — Com aster parvus. 



Dorsal view, showing one ray in detail, and the cirri on about one- third ot the periphery 

 of the centrodorsal. 



Ends of the basal rays visible as prominent tubercles in the angles of the 

 calyx ; radials projecting slightly beyond the edge of the centrodorsal ; IBr, 

 very short and band-like just in contact basally but widely diverging so that 

 their lateral edges are separated by a broad shallow U-shaped gap ; IBr.-, triangu- 

 lar, twice as broad as long, the anterior angle very acute; IIBr 4 (3+4), widely 

 separated; IIIBr 2 (l-|-2); IVBr 2 (l-|-2), developed interiorly in reference to 

 the IIBr series, but seldom present. 



