ISOPODS OF NORTH AMKRfOA. 



197 



FIG. 183. Roc i - 

 NELA CUBENSI8. 

 HEAD. 



ROCINELA CUBENSIS Richardson. 



Roanela cubens!* RICIIARDSOX, Proc. Ainer. Philos. Soc., XXXVTI, 1898, pp. 

 13-14; Proc. I". S. Nat. -Mas., XXIII, 1901, p. 528. 



Locality. Off Habana. 

 Depth. 143 fathoms. 

 Outline of body oval, surface smooth. 



Head with rounded lateral margins. Its anterior margin is produced 

 forward in a large rounded projection, the breadth of 

 which is equal to its length, and the upper surface deeply 

 concave with upturned edges. This projection extends 

 forward for about half its length and then upward, the 

 change in direction being gradual. Eyes large and 

 composed of ten rows of ocelli. Two small tubercles 

 are situated between the eyes, and in the middle of the 

 head and back of these is an arc-shaped depression. The first antenna 

 reaches the posterior margin of the head; its flagellum is composed of 

 six articles. The second antenna extends to the 

 posterior margin of the third thoracic segment; 

 its flagellum is composed of fifteen articles. 



The thoracic segments are subequal in length. 

 The epimera are long and narrow, with very acute 

 posterior angles. 



The first segment of the abdomen is almost en- 

 tirely concealed by the last thoracic 

 segment. The fifth is likewise 

 covered at the sides by the fourth 

 segment. The last abdominal seg- 

 ment is triangular in shape with a 

 rounded posterior margin. The 

 outer branch of the uropods is very 

 broad and oar-shaped, with a 

 rounded extremity. The inner 

 branch is long and slender, of equal 

 breadth throughout its length and 

 rounded on its posterior margin. 

 The inner branch is the longer one. 

 Both are fringed with hairs. 



In the prehensile legs of this spe- 

 cies the basis presents a row of tubercles on the superior margin. 

 There are two spines on the propodus. one on the carpus, and two on 

 the merus. The gressorial legs are but slightly spinulose. 



Type. The tj T pe specimen was found off Habana, latitude 23 11' 

 north, longitude 82 19' 6" west, Station 2341, 143 fa thorns (U.S.N.M., 

 Cat. No. 20087). 



FIG. 184. R O C I N E L A 



CUBENSIS. a, MALE, x 2J. 

 6, LEG OF FIRST PAIR. 



X 4j. C, LEG OF FOURTH 

 PAIR. X 4j. 



FIG. 185. ROCI- 

 NELA CUBENSIS. 

 MAXILLIPED. 

 x 39. 



