34 



PHYLLOrOn CRUSTACEA 



face. The iiul maxillae are pmvided with more setae than is usual in the order. ]'.\nte of the 

 swimming letjs of jjairs 1-10 creniilate alont^ the hnrder; iL^ill un leijs of pairs 1-10 with 

 margin entire. Last pair of appendages in both sexes with gill reduced in size and with 

 a setose end; and with an epite the end of which is deeply notched. In <5 , the basal joint 

 of the 2nd antennae is stout and cylindrical, with a slight setulose or smooth bulge on the 

 medial face near the base. Distal joint of 2n(l antennae snidoth, unguifnrni, only slightly 

 curved. The S genital inmch has 2 pusterinrly directed processes on each side. The dorso- 



FiGURE 2. — Brainliinccta oricnlalis. A, head of Chushol i from above. B, head of Chushol 9 from in front. 

 C, end of abdomen of Chushol i from above. (Heads X H. abdomen X IS.) 



lateral process haniifcirm with a ventrally directed side-process. The ventromedial process 

 cylindrical. The cercopods of the & slender, narrow, and pointed, straight, or slightly curved 

 outward at the tips; both margins fringed with plumose setae nearly to the l)ase. Tn 9 2nd 

 antennae Hat and blade-like with a well-marked acute terminal point, with a well-marked notch 

 on the inner margin lietween the point and the body of the antenna. Ovisac does not reach 

 beyond the .?rd post-genital (S{\\ post-pedigennis ) segment. Length: <J 12-v38 niiu. ; 9 

 12-43.5 mm. 



Daday (1910) divides this species into a small "forma ^TrmiHs" and a larger "forma 

 aestivalis," but since all intermediate sizes arc foinid and at all times nf the breeding season, 

 it seems unnecessary to make this distinction. 



This species most closely resembles B. fero.v (Milne-Edwards), and in fact l)oth Daday 

 (1910) and Smirnov (1932) are a little dinil>tfiil as to whether the two species are really 

 distinct. It appears to me that they very i)robably are not the same, though they are certainly 



I 



