312 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



lower margin which is devoid of spinules; merus with the outer side rounded 

 and the lower margin smooth and armed with a single small spine near the 

 base; carpus like that of the larger cheliped; hand narrower than that of the 

 larger cheliped, somewhat contracted near the base of the fingers; fingers 

 hairy, much longer than the palm, the inner margins not dentate; the pollex 

 tapers from the base, but the dactyl is of the same width from the base to 

 within a short distance from the tip; tips of the fingers curved and crossing 

 when closed. A small tooth at the distal end of the lower margin of the 

 ischium of the 2 following pairs of legs; coxa of the fourth pair enlarged and 

 flattened horizontally, the outer margin sharp and rounded. First pair of 

 abdominal appendages in the male small and uniramous; second pair bira- 

 mous, the rami slender. The first pair of pleopods in the female is much 

 larger than in the male but uniramous and nearly as long as the second pair 

 which is very similar to that of the other sex ; the following pairs are broad 

 and foliaceous, with the outer margins incurved and furnished with hairs. 

 Uropods with a large tooth on the peduncle over the interval between the 

 rami; outer ramus large, thickened, armed with a small, sharp spine at the 

 base, the anterior portion thickened at the base and sloping distally where it 

 is covered with a dense felt of short hairs ; posterior portion smooth and 

 limited anteriorly by the abrupt and slightly overhanging edge of the thick- 

 ened area; inner ramus oblong, very much smaller than the outer, and 

 gliding on the smooth posterior portion of the latter. Telson very short, 

 much broader than long, the middle portion of the posterior margin convex, 

 the outer angles prominent but rounded. The sides of the third, fourth, and 

 fifth abdominal segments are furnished with patches of fine hair. 



Length of female specimen 115 mm., carapace 28 mm., large arm 50 mm., 

 hand 20 mm., carpus 12 mm., small arm 40 mm., hand 17 mm., carpus 

 8.5 mm., telson 8x11 mm. Length of male specimen no mm., carapace 

 27 mm., large arm 60 mm., hand 27 mm., carpus 14 mm., small arm 45 mm., 

 hand 22 mm., carpus 8 mm. 



Three specimens, one male and two females, from San 

 Jose del Cabo, Lower California, collected by Dr. Eisen. 

 The types are in the possession of the California Academy 

 of Sciences. 



Family CRANGONID^. 



Crangon Lockingtonii sp. nov. 



Plate XXXV, Figs. 14-16. 



Crangon munitus Lockington (not Dana), Bull. Essex Inst. v. 10, p. 159, 

 1878. 



Rostrum oblong, concave above, rounded in front and arching over the 

 eye-stalks. Two strong spines on the median carina of the carapace; 2 pairs 

 of spines opposite the interval between the median ones, the 4 situated in 

 the same transverse line; suborbital and antennal spines well developed; a 



