A. E. Verrill — Revision Genera and S2^ecies of Starjishes. 201 



Subordei- II. — Paxillosa Per. (sens, restr.). 



Family IX. — Poecellanasterid^e Sla. 

 Family X. — Archasteeid^ Vig, (restr. to Archaster). 

 Family XL — Asteopectinid^ Gray (restr.). 

 Family XII. — Luiditd^ V., nov.=Ludiin8e Sla. 



It will be noticed than in the above arrangement the Archasterida? 

 of Perrier, 1894, has been divided into five distinct families (Families 

 V, VI, VII, VIII and X). The larger number of genera are placed 

 in the Plutonasteridae, which includes three groups that appear to be 

 of subfamily rank. 



The synonymy given will sufficiently indicate the limits of the 

 groups in most cases. 



The new family, Goniopectinidae, is proposed to include Gonio- 

 pecten Per. (restr.), type G. demonstrans, together with an allied 

 new deep sea genus Prionaster Ver., type P. elegans, with odd inter- 

 radial marginal plates and a corresponding odd row of actinal plates. 

 It is from the West Indies. The genus Graspidaster Sla., which I 

 have not seen, probably belongs to the same family. In this group 

 the adambulacral, actinal, and marginal plates are surrounded by 

 special spinules united together by a web, so as to form very spe- 

 cialized fasciolated grooves. It is related to the Astropectinidae, as 

 well as to Pontasterinae. 



The family Benthopectinidoe includes, so far determined, only the 

 genus Benthopecten Y ex. ^ Par archaster Sladen. 



The family Odontasteridfe is proposed for Odontaster, Gnathaster, 

 and allied forms, having one or two large recurved spines on the 

 jaws, and also odd interradial marginal plates. It is equivalent to 

 Gnathasterinffi Per., minus Hoplaster. 



Archasteridre is restricted to the typical genus Archaster^ which is 

 believed to be closely allied to the Astropectinidfe. 



Family 0D0NTASTERID.a3 Ver., nov. 

 Gnathasterince (jjctrs) Perrier, Exp. Trav. et Talism., pp. 244, 251, 1894. 



Form either pentagonal or stellate with a broad disk. Marginal 

 plates well-developed. 



Jaws, each with a single, recurved, more or less hyaline median 

 spine, or with two such spines, side by side. In the latter case one 



