212 University of California Publications in Zoology [Vol. 23 



Genus Loxorhynchus Stimpson 



Carapace spiny or tuberculated. Eostrum two spined, spines coalescent at base 

 and then divergent. Basal antennal joint enlarged, subquadrate, and having a 

 laterally projecting spine at the outer angle. Freocular and postoeular spines 

 prominent; postoeular flattened and densely hairy on anterior face, so that cornea 

 of retracted eye is partially concealed from above; orbits interrupted by a deep 

 sinus above and below. 



Key to the California Species of Loxorhynchus 



I. Hepatic region with two large spines; carapace with numerous nearly equal 

 tubercles; sparingly hairy or smooth in adult. 



grandis, p. 212. 

 II. Hepatic region with one large spine ; carapace with from nine to twelve 

 prominent tubercles; covered with a short, thick, felt-like coat of hair. 



crispatus, p. 213. 



Loxorhynchus grandis Stimpson 



Loxorhynchus grandis Stimpson, Proc. Boston Soc. Nat. Hist., 7, 85, 1857; 

 Jour. Boston Soc. Nat. Hist., 6, 452, pi. 20, fig. 1, pi. 22, fig. 1, 1875; 

 Holmes, Oeeas. Papers Calif. Acad. Sci., 7, 29, 1900 ; Bathbun, H. A. E., 

 10, 175, 1904; Weymouth, Stanford Univ. Publ., Univ. Ser., no. 4, 31, 

 pi. 5, fig. 14, 1910; Baker, Eep. Laguna Mar. Lab., 1, 102, 1912. 



Fig. 132. Loxorhynchus grandis, ?, X % ; a, ventral; o, lateral view of rostral 

 region (after Stimpson). 



Characters. — Carapace broadly ovate, with numerous nearly equal tubercles ; 

 sparingly hairy or smooth in the adult; hepatic region with two large spines. 

 Bostrum much deflexed, curved almost in a direction at right angles with the 

 horizontal axis of the body. Preocular spine large, often more or less double 

 pointed. 



Dimensions. — Type, female: length of carapace 141 mm., width 115.3 mm. 

 A large specimen taken at San Diego measured 186.4 mm. in length and 148.6 mm. 

 in width (Stimpson). 



Color. — Color of exposed parts is reddish, inclining to roseate, becoming yel- 

 lowish, white on the sides. Fingers white (Stimpson). 



Type Locality. — Coast of California, near San Francisco. 



Distribution. — From Point Beyes and the Farallon Islands to San Diego, Cali- 

 fornia; 6% to 68 fathoms. 



