A REVIEW OF THE MYSIDACEA 



221 



fourth pleopod of the male, which is composed of a single joint 

 only whereas in Acanthomysis it is 2- jointed and in Proneomysis 

 3-jointed. 



PARACANTHOMYSIS KURILENSIS Ii 

 FlGTJBE 95 



Paracanthomysis Jcurilensis Ii, 1936b, p. 11, figs. 29-41. 



Occurrence. — Bering Island: L. Stejneger collector, 35 females, 6 

 males up to 14 mm., breeding ; No. 2541, L. Stejneger collector, 1882-83, 



Figure 94. — Proneomysis tvailesi Tattersall: a, Antennal scale and peduncle, X 39; b, 

 fourth pleopod of male, X 39; c, fifth pleopod of male, X 39. 



1 adult female ; from mouth of cod, N. Grebnitzky collector, 9 males 

 up to 18 mm. 



Distribution. — Hitherto known only from the Kurile Islands, the 

 present material from Bering Island indicates a considerable northern 

 extension of the known geographical range of this species. 



Remarks. — These specimens agree closely with the careful descrip- 

 tion and clear figures of Ii, and I have nothing to add to his account. 

 I give here figures (fig. 95, a-c) of the antennal scale, telson, and 



