^'l'8;i3^'] PROCEEDINGS UF THE NATIONAL MUSEUM. 247 



the i)ollex by about one-sixtli of its IcMijitli, sleiidor, similarly iirmed 

 withiu <'\<'ei)t that tlie iiieiiuhir tubercles are ]»roinineiit nearer the 

 palm. HnuiUer cheliped witli lini;ers much louger than i)alm. Ambu- 

 latory legs with meral joints wide, transversely striated, and hirsute 

 near the base; remaiuin<>' joints smooth; dactyls very slender. There 

 are a few scattered haiis on tlie lower surface of the carapace, and a 

 fringe of hairs on the inferior margin; the abdomen and sternum are 

 also margined witli very short liajrs; otherwise tlie crab is smooth. 

 Length, lL*.r>; width, 20; length of large cheliped about 57 millimeters. 

 Horseshoe Eend, Colorado River, Lower California, U. !S. Fisli Coui- 

 uiission steamer Albatross ; one male (17459). 



Family (iKAPSlD^. 



Subfamily Grapsinti^l 



Pachygrapsus longipes. ^ 



One small specimen of a fenuile witli eggs is closely related to P. 

 pUcatus (Milne Edwards), but differs in the smoothness of the cara- 

 pace. The anteridr portion of the (;arapa(;e and the margins are faintly 

 plicated transversely, but without stiff" hairs. The frontal lobes are 

 well marked and the margin of the front is slightly convex. There is 

 no tooth behind the postorbital. The cheli])e(is are coveied with 

 grannies, arranged in irregular reticulations; there are several si)iues 

 at the distal extremity of the merus and one sharp spine on the inner 

 side of the carpus; a sharp longitudinal crest extends i'rom the tip of 

 the pollex back on the ]>alm; the tips of the fingers are outlined with 

 thick, bristly hair. The ambulatory legs have the nuMal joints trans- 

 versely plicated, denticulate and hairy on the u[)per margin, lower 

 margin \^ith one or two spines near the distal end; remaining joints 

 furnished with a few hairs, very slender; propodal joints much longer 

 than in idicaius or winittus. Color in alcohol, green, mottled; legs 

 striped with dark. 



Length, G.5; Avidth, 8 niillimeters. 



Honolulu, U. 8. Fish Commission steamer Albatross, 1801 (17320). 



Brachynotus (Heterograpsus) jouyi. 



Carapace much broader than long, nearly as wide at the orbital 

 angles as at the last antero lateral teeth; slightly convex in both direc- 

 tions; punctate, pnbest^ent, and roughened Avith minute, spiny granules 

 anteriorly and on the lateral margins. Front not advanced, <ledexed, 

 seen from above almost straight; seen from in front the margin has two 

 small median lobes separated by a slight sinus, the remainder of the 

 edge wavy. The superior orbital border slo]»es outwar«l and backward 

 to the base of the orbital tooth. Lateral teeth three, including the 

 postorbital, prominent, acute, the first two similar, separated by a deep 

 sinus, the third smaller, separated from the secoiul by a shallower, 



