580 CALIFORNIA ACADEMY OF SCIENCES. 



duncle. The second antenna? are furnished with an ob- 

 long scale which is shorter than the rostrum ; the flagel- 

 lum is very slender and longer than the body. Mandibles 

 with an oblong molar tubercle and a curved, somewhat 

 tapering, dentate cutting edge and a three -jointed palp 

 which is about as long as the cutting edge. Third max- 

 illipeds reaching about to the tip of the peduncle of the 

 second antenna^, and furnished with a slender exopod 

 which is nearly or quite as long as the antepenultimate 

 joint; terminal joint about three -fourths as long as the 

 preceding one. First pair of chelipeds slender and not 

 reaching beyond the tip of the rostrum; the carpus is 

 very little longer than the preceding joint and bears no 

 spine ; hand but little over one-half the length of the car- 

 pus, slender, linear, the fingers straight and about as long 

 as the palm. The second pair very little longer than the 

 first and like them do not extend beyond the tip of the 

 rostrum; the carpus is not one -half as long as the pre- 

 ceding joint and is nearly as long as the palm of the pro- 

 podus. Hand slender, linear, slightl}^ bent, the fingers 

 nearly as long as the palm, nearly straight, the tips hooked. 

 The three remaining pairs of pereopods are subequal in 

 length and a little longer than the chelipeds; propodi 

 spinulous on the posterior margin, about twice the length 

 of the carpi; tarsi slender, curved, acute. 



Telson rounded above, longer than the preceding joint 

 and furnished with two or three pairs of aculei near the 

 margin and several seta? at the tip. 



Length, 4.5 cm. 



Taken by Dr. Ritter at San Diego, July, 1891. Four 

 specimens. 



This species is near Palienion squilla, scrratus and es- 

 pecially affinis M. Edw. From the last named species it 

 differs in the broader rostrum, the much shorter second 



