ISOPODS OF TSTORTH AMERICA. 



813 



tubercles are situated in a transverse line on the posterior margin of 

 this segment. The terminal segment is subtriangular in shape, with 

 a broad funnel-like excavation at its extremity, formed by the infold- 

 ing of the lateral edges. The anterior part of the terminal segment 

 is very convex, upon which elevation are situated three large tuber- 

 cles in a transverse row, the center one being in the median line. At 

 the base of the terminal excavation " is also a small tubercle. Both 

 branch.es of the uropoda are similarly shaped, being of the same width 

 throughout their entire length, and rounded posteriorly. The outer 

 branch is somewhat shorter than the inner branch; neither reach the 

 extremity of the abdomen. 



Individuals were found at Gualala, California, on Haliotis rufescens, 

 by Dr. R. E. C. Stearns; also, one specimen at Catalina Harbor, Cali- 

 fornia, and one at Popoff Island, Aleutian Islands, at low water, by 

 Dr. W. H. Dall. 



Type. Cat. No. 22569, U.S.N.M. Popoff Island, Aleutian Islands. 



CILICiEA GILLIANA Richardson. 



Cilicsca caudata gilliana RICHARDSON, Proc. U. S. Nat. Mus., XXI, 1899, pp. 

 840-841; Ann. Mag. Nat. Hist. (7), IV, 1899, pp. 185-186; American Nat- 

 uralist, XXXIV, 1900, p. 224. 



Localities. Catalina Island, California; Gualala, 

 Mendocino County, California. 



Depth. 30-40 fathoms in sandy mud. 



Body slightly attenuated in front. Color, light 

 brown with markings of black. 



Head with anterior margin thickened and slightly 

 produced. Large median point triangularly shaped, 

 on either side of which the frontal margin of the 

 head is broadly lobed. Eye situated at the pos- 

 terior angles of the head. F 

 pair of antennae reach beyond the 

 posterior margin of the head; 

 first joint of peduncle is oblong; 

 second joint very small; flagellum 

 consists of eight joints. The second pair of antennae 



FIG. 341. ClLIC^IA GIL- 

 LIANA. X 8. 



are broken in the specimens examined. 



The thoracic segments are about equal in length, 

 with short but very broad epimera, which extend 

 downward laterally, forming an angle with the 

 segments. The last segment is ridged with very 

 low tubercles on its posterior margin. 



The first abdominal segment has two suture lines, 

 indicative of coalesced segments, and bears five 

 double tubercles. The terminal segment has a large sinus, in which 

 are situated six sharp teeth. At the base of the sinus is a large 



PIG. 342. CILIC.EA GIL- 

 LIANA. MAXILLIPED. 

 x51|. 



