ISOPODS OF NORTH AMERICA. 



B13 



tubercles are situated in a transverse line on the ])osterior mart^-in of 

 tliis seo-ment. The terminal se^-nient is subtriaiio-uhii- 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 segnuMit 

 is very convex, upon which elevation are situated three lai'o-e tul)er- 

 cles in a transverse row, the center one ])eing- in the median line. At 

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

 branches of the uropoda ar(> 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 TIaliotis rufescens, 

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

 fornia, and one at Popoti' Island, Aleutian Islands, at low water, b}^ 

 Dr. VV. H. Dall. 



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



CILICiEA GILLIANA Richardson. 



Cilicxa Cauda fa gilUana 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 nmd. 

 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 ))roadly lobed. Eye situated at the pos- 

 terior angles of the head. F 

 pair of antenn;e reach beyond the 

 posterior margin of the head; 

 tirst joint of peduncle is oblong; 

 second joint very small; tiagellum 

 consists of eight joints. The second pair of antenniv 

 are broken in the specimens examined. 



The thoracic segments are about equal in length, 

 with short but very broad epimera, Avhich extend 

 downward laterally, forming an angle with the 

 segments. The last segment is ridged Avith very 

 low tubercles on its posterior margin. 



The tirst 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 



Fig. 341.— Cilicea gii. 



LIANA. X 8. 



Fig. 342.— Cilice a gil- 



LIANA. MaXILLIPED. 



X 51|. 



