NOTES ON 



PACIFIC COAST CRUSTACEA. 



BY W. N. LOCKINGTON. 



Crangon nigricauda Stimpson. 



The identity of this species with the C. vulgaris of the Atlantic is 

 suspected. Owen, and after him Dana, mentions it as C. vulgaris, and 

 Kingsley, in his "List of the North American Caridea" (Bull. Essex 

 Inst., Vol. 10, Nos. 4, 5, 6, p. 54) says of C, nigricauda, (7. vulgaris, and 

 C. alaskensis Lock. (Proc. Cal. Acad. Sci., 1876, p. 34), "I am inclined 

 to consider the three species above as the same, but need larger series 

 to decide." 



In an unpublished MSS., written previous to the publication of the 

 above list, I find the following notes : "(7. alaskensis does not appear, 

 on further examination, to be distinct. Minute black spots, like those 

 scattered over the body and hands in the specimens described under 

 this name, are also abundant in fresh specimens of C. nigricauda from 

 San Francisco Bay, and sometimes persist in alcohol." 



This species, therefore, is known to range along the Pacific coast 

 from Alaska to San Diego, from which last locality were obtained 

 specimens which, from the persistence in a dried state of a single 

 black spot on each side of the tail, were described by me as (7. nigro- 

 maculata (Proc. Cal. Acad., loc. cit.). 



Crangon munitus Dana, U. S. Ex. Exp. Crust., p. 536, pi. xxxiii, 

 fig. 5. 



A well-armed form obtained in Magdalena Bay, Lower Cal., by W. 

 J. Fisher, and having, besides the infra-orbital, antennal, and hepatic 

 spines, four spines upon the upper surface of the carapax, one on 

 each side of the centre line, and two spines in the centre line, the 

 posterior one placed far back, must, I believe, be referred to this spe- 

 cies, which is thus proved to have a very considerable range, since 

 Dana obtained it in Puget Sound. The rostrum is broader than usual 

 in the genus, and the last abdominal segment is exceedingly com- 

 pressed, the abdomen tapering rapidly at the fifth segment. 



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