147 



the 6th segment. Pereopods II are nearly the same length as pereopods I, 

 the 5th segment shorter than that of pereopods I; the conical 6th segment 

 is very slightly larger than the 5th and less densely armed than the 6th 

 segment of pereopods I. Pereopods III and IV are similar in structure, 

 long, and strong; the 2nd is almost equal to the 4th and 5th segments 

 together; the 4th segment is slightly shorter than the 5th and almost 

 equal to the narrower 6th segment. Pereopods V are as strong as the 

 preceding ones; the broad 2nd segment is almost 2/3 the length of the 

 4th and 5th segments together; the length ratios of the distal segments 

 are 10: 14: 9. Pereopods VI-VII in the male are thin and weak (not 

 described in the female); the 2nd segment is much shorter than the 4th 

 and 5th segments together; the length ratios of the distal segments are 

 10: 8: 5 in pereopods VI and 6: 9: 5 in pereopods VII. The claws of 

 pereopods V-VII are short and strong. 



The uropods have broader basipodites and rami than in 

 P. stephenseni. In the male the distal part of the endopodite of uropods III 

 is curved and apically obtuse. The telson is oval-triangular and reaches 

 1/3 the length of the basipodite of uropods III. 



Distribution: Found in the Atlantic (36° 17' N, 28° 53' W) and 

 Pacific (30°52' N, 153° 16' E) oceans in total catches from 0-3,000 and 

 0-5,000 m. 



3. Proscina birsteini Vinogradov, 1956 (Fig. 54) 



Vinogradov, 1956: 202. 



One male 6 mm long is known. 



The proximal segment of the flagellum of antennae I is weakly 

 pubescent and roughly thrice longer than the peduncle. In antennae 11 

 the long peduncle consists of rod-shaped segments.'* Maxillae I have a 

 broad petaloid palp; the outer lobe has a straight distal margin armed 

 with five spines divided into two groups; the inner lobe is broad, with 

 a straight distal margin. The outer lobes of maxillae II are slightly nar- 

 rower than the inner lobe. The outer lobe of the maxillipeds are broadly 

 oval, slightly concave on the inner margin, and apically with a small 

 depression in which a seta is lodged; the oblong inner lobes reache 1/2 

 the length of the outer lobe and are armed in the distal part with small 

 thin setae. 



In pereopods I the 2nd segment is shorter than the 5 th and 6th 

 together, the 5th segment shorter than the slightly conical 6th segment, 

 and the latter armed with a few short setae; the claw is straight and 

 less than half the length of the 6th segment. Pereopods II are equal in 

 length to pereopods I but the 5th and 6th segments relatively narrower. 



"• The distal segment [of antennae II] are broken in the specimen available. 



