ACADEMY OF SCIENCES. 145 



other sex. The club of the antenna? is also wholly black, except the extreme 

 tip, which is orange. 



Exp. of wings, 1.25 inch. 



25 4 ($ . Tehachepi Pass, Southern California. Taken by Mr. R. H. 

 Stretch, July, 1875. Closely allied to T. Tetra, Behr, but differing from 

 that species by the apparently utter absence of fulvous, which is only distin- 

 guishable by a powerful lens. It is also slightly a larger insect than T. Tetra, 

 and the wings are all more angularly produced than in that species. It is, 

 however, sufficiently near to be confounded with it, and probably may be 

 found in other localities in California. 



Remarks on the Crustacea of the West Coast of North 

 America, with a Catalogue of the Species in the 

 Museum of the California Academy of Sciences. 



BY W. N. LOCKINGTON. 



GRAPSOIDEA, or OCYPODID^. 



OCYPODIDa:. 



Ocypoda Gaudichaudii? Edwds. & Luc. D'Orbigny's Voy. in Am. Merid. 

 Crust., p. 26, pi. XI, fig. 4. 

 As I have not seen Edwards' description of this species, I subjoin a short 

 description : 



Carapax slightly wider across the centre than in front. Lateral angles 

 of anterior margin very prominent, upper orbital border sinuate; front 

 narrow, eyes large. Right cheliped much larger than the left in both 

 sexes; arm trigonal, with its inferior surface somewhat concave, in conse- 

 quence of both its margins being slightly raised and bjeset with spinous 

 tubercles; the upper margin rounded, rugose with rows of small tubercles. 

 Carpus short and stout, with a sharp spine on its anterior border at distal 

 end, and rows of small tubercles above, becoming more prominent and some- 

 what spinose distally. Manus broad and thin, covered with tubercles ex- 

 teriorly; a row of saw-like spines along the lower margin continued along 

 the propodal finger, which is cristate, hooked at end, and with several teeth 

 internally. Movable finger similar to fixed, spinose along its upper margin. 



Ambulatory limbs flattened; merus with a sort of roll on its upper margin, 

 crossed by tubercular ruga?. Carpi of second, third and fourth pairs setose 

 at distal lower extremity; propodi of the same three pairs setose below; 

 carpus and propodus of fifth pair without hairs; all the dactyli fringed in 

 front with seta?. Third joint of outer rnaxillipeds narrower, and about 

 half the length of the second joint. 



First two segments of male abdomen very short; third and fourth longer, 

 fifth still longer, sixth longest. Fifth segment narrowest; sixth convex on 

 both sides; seventh a small truncate triangle. Fourth and fifth segments of 



