OXYCEPHALUS PISCATOR. 59 



joints together. The femur of the sixth pair is irregularly pear-shaped, 

 a fifth part longer than broad, only a little broader than the femur of 

 the fifth pair, and shorter than the four following joints together; the 

 front margin of the tibia is fringed with a row of spines, one longer one 

 and one very short one alternating; the front margin of the carpus has 

 a similar row of spines, one longer one and two very short ones alter- 

 nating!; the front margin of the dactylus is sparingly serrated. The se- 

 venth pair (PI, I, fig. 14), reach to the middle of the carpus of the 

 sixth; the femur is pear-shaped, and somewhat shorter than all the follow- 

 ing joints together;- the metacarpus is a little longer than the carpus, 

 but shorter than the tibia. 



The under margins of the pleonal segments are more or less 

 rounded, sometimes uneven, but not produced into tooth-like projec- 

 tions as in Oxycephalus Clausi. 



The last coalesced ural segment is a little more than a third part 

 longer than broad. 



The first pair of uropoda (p. 39, fig. 75) reach to the apex of the 

 last, and to the apex of the telson ; the peduncle is a little longer than 

 the inner ramus, which is a little longer than the outer; both rami are 

 strongly serrated. The second pair reach a little beyond the apex of the 

 peduncle of the first pair, and very little beyond the base of the last pair; 

 the peduncle is somewhat longer than the inner ramus, and twice as long 

 as the outer. The third pair reach scarcely beyond the apex of the 

 telson ; the peduncle is as long as the inner ramus, which is a trifle 

 longer than the outer. 



The telson is % only about a sixth part longer than broad, and 

 triangular, the margins being very convex, and serrated. 



COLOUR. Yellowish. 



LENGTH. 14 20 mm. 



HAB. The temperate, subtropical, and tropical regions of the At- 



lantic; the Mediterranean; the Indian Ocean the subtro- 

 pical and tropical regions of the Pacific. 



