222 



In all the uropods the endopodites are longer than the basipodites. 

 In uropods I the inner margin of the endopodite is finely denticulate and 

 the posterior margin of the uropods is armed with long denticles. In 

 uropods II the inner margin of the endopodite has sparse, barely per- 

 ceptible denticles; the posterior margin of the uropods has numerous 

 185 distinct small denticles. In uropods III the inner margin of the exo- and 

 endopodite is denticulate. The telson is triangular; its basal width is very 

 slightly less than its length, and the tip is acute. 



Distri hution: The northern tropical part of the Atlantic Ocean, and 

 northern tropical and equatorial regions of the Indian Ocean. It is found 

 in catches from depths of 200-500, 500-1,000 m, and in through catches 

 from depths of over 200 m to the surface. 



32. Scina alberti Chevreux, 1919 (Fig. 93) 



Chevreux, 1919: 3. 



Only one specimen is known, which has been incompletely 

 described; sizes not given. 



The body has a dorsal keel which, on the last pleon somite, termi- 

 nates in a denticle. The eyes are absent. Antennae I are equal to the body 

 in length. The, mouthparts are not described. 



, In pereopods I the 5th segment is somewhat longer than the 6th, in 

 pereopods II shorter; the claw is thin and more than 1/2 the length of the 6th 

 segment. Pereopods III and IV are identical in structure; the 4th segment 

 is roughly equal to the 6th in length, the 5th segment is slightly shorter; 

 the claw 's very thin and long, being 2/3 the length of the 6th segment. 



IH*; 



Fig •^^ Scina alhe'-ti Chevreux, male (after Chevreux, 1935). 



