426 



8. Phronima bucephala Giles, 1887 (Fig. 185) 



Giles, 1887: 215; Laval, 1970: Al .—colletti Shih, 1969: 21 (part.). 



Length of females up to 9 mm, of males 6-7 mm. 



The body is thin, especially in females, with a delicate integument. 

 The head is weakly bulged and dorsally almost inconspicuous. Both pairs 

 of antennae are well developed in males. 



The 2nd segment of pereopods V is longer than the analogous seg- 

 ment of pereopods III; the length of the 4th segment in females is more 

 than its width, while in males the length and breadth are approximately 

 equal , the maximal width in the middle of the segment; the 5th segment 

 of pereopods V in females is almost triangular and the posterior proxi- 

 mal angle does not project; in males this segment is almost rectangular 

 or slightly trapezoid, with a rounded posterior proximal angle which, 

 however, does not project proximally along the margin of the 4th seg- 

 ment; the length of the segment along the anterior margin (including the 

 anterior distal tooth) is more than the maximum width of the segment; 

 the medial structures of the distal margin of the 5th segment are close 

 to those in P. colletti and are identical in both sexes: the medial protu- 

 berance is not high and has close-set denticles on its posterior margin; 

 the medial denticle is also developed. 



Fig. 185. Phronima bucephala Giles (after Laval, 1970). 



