208 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



FIG. 209. Roci- 

 NELA TUBER- 

 C U L O S A . 



MALE, x 2J. 



ROCINELA TUBERCULOSA Richardson. 



Kodnda tuberculom RICHARDSON, Proc. Am. Philos. Soc., XXXVII, 1898, p. 16, 

 fig. 10; Proc. U. S. Nat. Mus., XXI, 1899, p. 828; Ann. Mag. Nat. Hist. 

 (7), IV, 1899, p. 170. 



Locality. Southern part of Gulf of California. 

 Depth. 8-10 fathoms. 



Surface of body punctate and marked with small black dots. The 

 posterior margin of each of the thoracic and abdominal 

 segments is lined with a row of tiny tubercles, above 

 which is a row of small black dots. 



Head subtriangular, rounded in front. Eyes large 

 and situated at a distance of one-third of the head apart. 

 The first antenna, with a flagellum of five articles, reaches 

 the posterior margin of the head; the second antenna 

 extends to the posterior margin of the second thoracic 

 segment; its flagellum is composed of eleven articles. 



The posterior margin of all the thoracic segments is 

 edged with a row of small tubercles. The epimera are 

 narrow, those of the second, third and fourth segments being rounded 

 at the tip, while those of the last three segments are more acute. 



The first abdominal segment is entirely concealed by the last tho- 

 racic segment. The second, third, fourth and fifth segments are like- 

 wise edged with a row of small tubercles. 

 The last segment is widely rounded. 

 The outer branch of the uropods is some- 

 what narrower and shorter than the inner 

 one and is rounded at its extremity. The 

 inner one is bluntly rounded. Both are 

 fringed with hairs, and on their exterior 

 margins are armed with spines. The 

 prehensile legs have three long, stout 

 spines on the merus, one on the carpus, 

 and three on the propodus. The gresso- 

 rial legs are covered with spines. 



Two individuals of this species were 

 found in the southern part of the Gulf of California, at station 2824, 

 eight fathoms, type (Cat. No. 20652, U.S.N.M.), and station 2828, ten 

 fathoms. 



FIG. 210. ROCINELA TUBERCULOSA. . 

 MAXILLIPED. x 27}. b, SECOND LEG. 

 x 15}. 



