VOL. XVI "1 



180:!. J 



PliOCElODINaS OF THE NATIONAL MUttElTM. 



22! 



the thin iiiiiei' (.'(l.u('' than the thickened outer niarj^in nnil is divided 

 li'oni them by (lee[) grtK)ves. JMeins joint of outer maxillipeds strongly 

 produced on the inner side, dee^jly cut at theautero interual angle. In 

 adult males the ehelipeds are nuxlerately robust, ])ubes('ent; nieius 

 trihedral, curved, outer jnargin s[)iny; the carpus has a su^jcrior, pos- 

 terior spine; palm iullated, iingers shorter tlian the palm, gaping. In 

 females and young the chelipeds are slender, the hands semicylindrical. 

 Ambulatory legs long and slendei', especially the hrst two i)airs; \vi(li 

 long hairs, those on tlie upper siuface curled; dactyli falciform, toothed, 

 in the lirst pair about one third the length, in the remaining i)airs 

 about one-half the length, of tl:c penultimate joints; these joints hav<' 

 no tliund) processes, but in the last two pairs are slightly thickened in 

 the distal half. 



Length of male 14, width !> millimeters. Length of female 14, width 

 10 millimeters. 



Southern California; W. II. Dall (1750.-)). 



Lower Califoruia; U. S. Fish Commission Htanmer Albatross, 1880: 



Bottom. 



crs. S. 



file. iiv. S. brk. Sli. 



I'lie. yl. S. 



Ine. gy. S. 



Podochela (Coryrhynchus) mexicana. 



On the median line of the gastric region there are two tubercles, 

 the posterior the longer. Cardiac and hejiatic i)rotiiberaiices lami- 

 nate, [uominent. Uostruin hood-shaped, thin, ridged above, obtuse. 

 Kidges of basal antennal joint thin, sinuous, subparallel, continued to 

 the anterior extremity and expanded in a lobe near the posterior end. 

 Pterygostomian ridge well developed. Chelipeds (of male) slender; 

 palm little intlated; lingers meeting along inner edges. Ambulatory 

 legs of moderate length; penult joints of last two pairs very slightly 

 thickened toward the distal end; legs, except the dactyls, ornamented 

 above with tufts of curled setie; propodal joints with long straight 

 hairs beneath; dactyls short, of last three pairs much curved and 

 spinuliferous. Sternum and basal joints of legs vermiculated. 



Lengtli, 10; width, 8 millimeters; length of cheliped, alxmt 12; of 

 iirst ambulatory leg, about 27; of second umbiihitory leg, about 21; of 

 fourth ambulatory log, about 11. 



Off Adair iJay, Mexico, in the Ciilf of California, lat.;no21'N., long, 

 %1'S'^ 40' W., 1 1 fathonis, s^ntj, brolvcn shells, gravel, temperature 07"^, 

 l^tation 3024, U. S. Kjsh Comndssion steamer Albatross,' one male (17330). 



This species niiirh resembles Podochela rcisci of the West Indies, luit 

 is at once <listii)guislied by the shortci' legs and the proniineiit iiiarginis 

 pf the basal anteiiiial joint. 

 Proc. ^, M, (i;j^~10 



