369 



Fig. 156. Parathemisto (Euthemisto) gaudichaudi (Guerin) (nfteT HuT\ey, 1955). 



the claw is almost straight, smooth, and 1/3 to 2/5 the length of the 6th 

 segment. Pereopods IV are similar in structure but the 5th segment is 

 relatively broader and in males its maximum width may be more than 

 half its length. Pereopods V are longer than all the other legs; the 2nd 

 segment is broad and shorter than the narrowly lanceolate 5th segment 

 or almost equal to it; the thin, straight or slightly curved 6th segment is 

 longer than the 5th segment, and armed along its anterior margin with 

 sparse submarginal setae with a row of dense short and tender setae 

 301 between them (in / bispinosa these setae, especially in the distal part 

 of the segment, are notably longer than in / compressa); the claw is 

 almost straight, its anterior margin neither armed nor denticulate, and 

 2/3 the length of the 6th segment is young specimens but only 1/10-1/6 

 in sexually mature specimens. Pereopods VI and VII are identical in 

 structure but pereopods VII somewhat longer than VI; the 6th segment 

 is somewhat (1.2-1.5 times) longer than the 5th segment and equal to or 

 somewhat longer than the 2nd; the claw is smooth and almost straight. 

 The posterior margin of the exopodites and the anterior margin of 

 the endopodites are finely denticulate in all the uropods. The inner distal 

 angle of the basipodite of uropods III is stretched into a denticle. The 

 inner margin of both rami of uropods II has a sharp concavity in the 

 proximal part; in this concavity both rami bear numerous minute tender 

 setae on the ventral surface. The exopodites of the uropods are shorter 



