192 University of California Publications in Zoology [Vol. 23 



Heterocrypta occidentalis (Dana) 



Cryptopodia occidentalis Dana, Amer. Jour. Sei. (2), 18, 430, 1854. 

 Heterocrypta occidentalis Holmes, Oeeas. Papers Calif. Acad. Sci., 7, 44, 



1900; Bathbun, H. A. E., 10, 170, 1904; Weymouth, Stanford Univ. 



Publ., Univ. Ser., no. 4, 21, pi. 2, figs. 4-5, 1910. 



Fig. 119. Heterocrypta occidentalis, rf, X % (after Dana). 



Characters. — Carapace broadly triangular; rostrum triangular, subacute, not 

 depressed; median region narrow, flattened upper surface bounded by two granu- 

 lated ridges, which converge to a point behind; cardiac region furnished with a 

 three-sided, pyramidal elevation, edges of which are usually granulated; posterior 

 margin of carapace not produced over the abdominal segments. Outer portion 

 of orbit with a superior and an inferior fissure. Chelipeds long, trigonal; hand 

 about as long as merus, angles prominent and dentate, sides concave; immovable 

 finger short, deflexed; movable finger short but longer than immovable one, when 

 closed its outer margin nearly at right angles to the long axis of the hand. 



Dimensions. — Type: width of carapace 31.8 mm. 



Cofor.— Beddish (Holmes). Tips of tubercles white, ridges bearing tubercles 

 a light purplish hue, remainder of carapace mottled with numerous minute spots 

 of white and purplish tint, giving a pink effect which closely approaches white. 

 Ambulatory legs usually a light yellow (Weymouth). 



Type Locality. — Monterey, California. 



Distribution. — From Gulf of the Farallones to San Diego, California, and Los 

 Coronados Islands; 13 to 36 fathoms (Bathbun). 



Family Inachidae (Maiidae) 



Basal joint of antennae (more correctly the coalesced second and third joints) 

 well developed, usually fused with the epistome and often with the front, usually 

 occupying a great part of the infra-orbital space. Orbits usually more or less 

 incomplete. Chelipeds rarely much greater than other legs, very mobile. 



Key to the California Genera of the Inachidae 



I. Basal joint of antennae extremely slender throughout its length and usually 

 long. Length of basal antennal joint, measured from raised margin of 

 endostome to insertion of free joints, greater than or at least equal to 

 the combined width of the joints and that portion of the epistome 

 or antennular fossettes lying between them, measured from bases of 

 eye-stalks (middle of lower orbital margin). Eyes without orbits and 

 not concealed. Bostrum simple except in Oregonia, in which it is bifid. 



