30 CALIFORNIA ACADEMY OF SCIENCES. 



Loxorhynchus crispatus St. 



Loxorhynchus crispatus STIMPSON, Jouru. Bost. Soc. Nat. Hist., Vol. VI, 

 1857, p. 453, PI. XXII, figs. 2, 3 and 4. ORTMANN, Zool. Jahrb. Abth. 

 f. Syst., Bd. VII, 1894, p. 45. RATHBCN M., Proc. U. S. Nat. Mus., 

 Vol. XVII, 1894, p. 74. 



Carapace rather narrowly triangular, somewhat flattened, not nearly so 

 wide and inflated as in the preceding species. Some of the tubercles are 

 much larger than others, the principal ones being located as follows: a 

 tubercle on the cardiac region which is connected with a tubercle on the 

 intestinal by a prominent ridge; two tubercles on the branchial regions, 

 the anterior of which is somewhat nearer the middle line; a large tubercle 

 on the hepatic region; a tubercle on the anterior and one on the posterior 

 portion of the median region; a tubercle on either side of the anterior 

 median tubercle; a row of small blunt tubercles on the median region 

 extending to each rostral horn. Rostrum longer than broad, not so much 

 depressed as in grandis, and having more divergent horns which are sepa- 

 rated for more than half the length of the rostrum. Preorbital spine 

 prominent, subconical. Chelipeds rather slender; merus with three or 

 four small tubercles on the upper side; carpus with small tubercles; 

 hand slender, slightly wider at the base, margins rounded. Ambulatory 

 legs rather short, the first pair in the female usually longer than the chel- 

 ipeds, merus grooved above; dactyls shorter and stouter than in grandis, 

 about one-half the length of the propodi. Abdomen of the male similar to 

 that of the preceding species, but the last joint is narrower. The cheli- 

 peds in the male are much longer than in the females, and in old speci- 

 mens they become enormously lengthened. 



Farallon Islands! San Francisco Bay! Monterey, 

 Santa Barbara! San Pedro! San Diego! San Miguel Is- 

 land (St.). 



The carapace in this species is covered by a very 

 dense, even coating of peculiar, short, thick hairs if 

 hairs they may be called which are so closely crowded 

 together that no spaces are left between them. In some 

 places they are less than twice as long as thick. Along 

 the sides of the carapace and on the median region 

 there are the usual curved setae, but on the legs and 

 abdomen there are numerous large, clavate setse; be- 

 tween these and the short thick setae there are, how- 

 ever, all stages of transition. 



