1 



[From the Proceedings of the California Academy of Sciences, Deceiilber 1, 187fi.i 



Keniarks on tlie Crustacea of the West Coast of Xorth 

 America, with a Catalogue of the Species in the 

 Mnseiini of the California Academy of Scieuces. 



BY W. N. LOCKINGTON. 



GRAPSOIDEA, ok OCYPODID.E. 



OCYPODIDJi. 



Ocypoda Gaudichaudii ? Edwds. \' Lm-. D'Orbignj''s Voy. iu Am. Meiid. 

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

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

 description : 



Carapax sHghtly 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 beset 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 upptr margin. 



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

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

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

 carpiis and propodus of fifth pair without hairs; all the dactyli fringed iu 

 front with setai. Third joint of outer maxillipeds narrower, and about 

 half the length of the second joint. 



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

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

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



