314 



legs in size; the distal segments are shorter than in pereopods VI. The 

 pleopods have a massive base and very short rami. The urosome is short 

 and about equal in length to somite III of the pleon. The rami of the 

 uropods are much shorter than the basipodites. 



The genus includes two species which are quite close. 



Type species: Paraphronima gracilis Claus, 1879. 



KEY TO SPECIES OF GENUS PARAPHRONIMA 



1. Pereopods VII extend to end of 5th segment of pereopods VI. Length 

 of head slightly less than its height. First two somites of pereon small, 



their total length about equal to length of somite III 



1 . P. gracilis Claus 



— Pereopods VII almost same length as pereopods VI. Length of head 

 slighty more than height. First four somites of pereon about equal in 

 size 2. P. crassipes Claus 



1. Paraphronima gracilis Claus, 1879 (Fig. 126) 



Claus, 1879: 65; Bovallius, 1887b: 27; Chevreux and Fage, 1925: 

 391; Spandl, 1927: 165.— edwardsi Bovallius, 1885b: 12. 



Length of females up to 16.5 mm, of males up to 11 mm; the usual 

 length of sexually mature specimens is about 10 mm. 



The head is disproportionately large and massive compared to the 

 thin body and weak extremities, its length exceeding the total length of 

 somites I-IV of the pereon, and its height slightly more than the length 

 and more than twice the height of the pereon somites. Antennae I in 

 257 females are at least 1/3 the head in length and the single segment of the 

 flagellum does not differ in width from the segments of the peduncle, 

 while in males it is broadened and elongated but the whole antenna 

 slightly shorter than the head. Antennae II in females are two-segmented, 

 but in males with a highly elongated 1st segment in the peduncle. 



Somites I-II of the pereon are approximately equal in total length 

 to somite III; somite VII is shorter and lower than the preceding ones 

 and its length twice its height. The coxal plates of all pereopods in 

 males are fused with the pereon but in females the coxae of pairs II-V 

 are free. Pereopods I and II are very small and their 2nd segment is 

 narrow. The 4th segment of pereopods I forms in the posterior distal 

 part a spoon-shaped projection with several setae along the margin; the 

 5th segment is distally broadened and its length about twice its width; 

 the 6th segment is narrow, slightly shorter than the 5th, and movably 

 articulated with its anterior distal angle in such a way that in a bent 

 position it forms a sort of weak double subchela; the claw is very short 

 and thickened at the base. Pereopods II are simple and have narrow 



