Pacific Coast of North America. 



187 



Fiff. 18. 



Cilicisa granulosa, x 8. Last 

 thoracic sej>^meiit and abdomen. 



of three coalesced segments. There are three transverse ele- 

 vations on this segment, which 

 are densely covered with gra- 

 nules. The terminal segment 

 bears three transverse eleva- 

 tions at the base, the median 

 one terminating in a spine. 

 On its posterior margin is a 

 quadrangular excavation, with 

 a long median tooth, bearing a 

 spine at its extremity. At the 

 base of the tooth is a small 

 elevation. On either side of 

 the terminal excavation, a short 

 distance up the lateral margin, 

 is a small spine. The fixed inner branch of the uropoda is 

 small and short ; the outer branch is long, blunt at the 

 extremity, somewhat incurved, and reaches, when open, much 

 beyond the terminal segment. The margins of the terminal 

 segment and the edges of the outer branch of the uropoda 

 are pubescent. 



The legs are all simple, ambulatory. 



One specimen from Cerros Island, Lower California, was 

 collected by Mr. A. W. Anthony, at a depth of 20 fathoms. 



Type. No. 22649, U.S.N. M. 



Family VI If. Serolidae. 

 16. Serolis, Leach. 



34. Serolis carinata, Lockiugton. 



Scrolls carinata, Lockington, Proc. Cal. Acad. Sci. vii. 1877, pt i 

 p. 36. ' r • 



Fig. 19, 



Serolis carinata, Lockington. 

 Hah. San Diego, California. 



[To be continued.] 



X 8. 



