Gi'itrric y(ime Stolastorias, Shufen. 575 



ns a sy!ioiiyin of Stolasterinn. Tlic calm traiisfenin;^ of the 

 name Stolasferiaa to another species and the use of it in othm* 

 than the original sense cannot be too stronjriy condemiXNJ. 

 This chanu;e \\i\^ entirely niinocessary, since Asteridf ffliciulla 

 has already servecl as the type (sub nomine foliacea) of 

 MartlKisten'as, JuUicn *. 



VVhcfher these smaller f^roups of Perrier are valid G^ener.i 

 or not is probably a matter of opinion. The distinction 

 between Marthaslerias and Distolasteriaa is simplv the 

 possession by the former of one, by the latter of t^vo, 

 adambulacral spines. Species of the latter f;roup have plates 

 with only one spine scattered amoni^ the others. It is even 

 seriously to be questioned whether si)me of these groups are 

 worthy of subp;eneric rank, but they have been so placed in 

 the following list in order to straighten out the claims of the 

 various names. The subgenus Siol'islen'as-f^ Sladen, will 

 therefore become the genus Coscinasteriaa, Verrill, and the 

 names Po/i/'isteriaa^ Perrier, and Stolasterias, Perrier (but 

 not of Sladen), will drop out of nomenclature. The list is as 

 follows : — 



Genus COSCINASTERIAS, Verrill^ 1SG9. 



Subgenus CosciXASTEiiiAS, Verrill, 1869; type, Asterias 

 calamarid, Gray, sub nomine C. inuricata. 



Subgenus Stolasterias, Sladen, 1889, restricted; type, 

 Asterias tenuisjyina, Lamarck. (Syn. Polijaslerias, 

 Perrier.) 



Subgenus Mautiiasterias, Jullien, 1878 ; type, Asterias 

 glaciah's, (). F. Mullcr, sub nomine J/, foliacea. (Svn. 

 tSlulustcrias, Perrier, nee Sladen.) 



Subgenus DistOLASTERIAS, Perrier, 1S9G ; ty[)e, Asterias 

 {Stolasterias) stichantha, Sladen. 



SUinford I'uivfTsitv, California, U.S.A., 

 March 14, llXX). 



• null. Soc. Zonl. FrnncP, 1878, p. 141. M<7rf/itistrriiis fofi'nreri i-» 

 eqiiivnleiit to Asterias ylacialis, O. F. Miiller, accurdiiig' to .Sladen and 

 Ludwi^j. 



t Erajdovcd n.i n gcniis in Sladen's sense bv Ludwijj, Meui. Mus. Comn. 

 Zoolojry, xx'xii. 1!>0.-, (July 17), p. L'l.'l. 



