150 PROCEEDINGS OF THE CALIFORNIA 



Unless this is the G. macrodactylus of M. Edwards, found on the coast of 

 Chili, it is certainly a new species. 



No. 49. Todos Santos Bay, near San Diego, dried. Hy. Hemphill. 

 No. 50. " " " «« " in spirits. Hy. Hemphill. 



Gelasimus gibbosus. S. I. Smith. Trans. Conn. Acad., March, 1870, 140; 

 plate 11, f. 11; pi. iv., f. 8. 



Numerous specimens from the West Coast of Lower California, principally 

 from San Bartolome Bay, agree with Smith's description and figure of this 

 species in every particular, except in having the front more suddenly curved 

 forwards. The sub-hepatic regions are thickly setose. 



The fingers of the smaller cheliped are equal in length, and twice as long 

 as the broad, stout, and short palmar portion of the manus; they are widely 

 separated at their base, gape throughout their length, and are curved to meet 

 each other at their extremities, which are of a yellowish brown tint. There 

 are a few scattered hairs on the fingers. In the female both chelipeds are 

 exactly like the smaller cheliped of the male. 



The depression between the buccal and sub-hepatic (jugal) areas is very 

 distinct; the teeth of the inferior margin of the orbit increase in size and 

 slenderness on the outer portion; and the fourth, fifth and sixth abdominal 

 segments are anchylosed. The prevailing tint of the carapax and limbs (in 

 spirits) is blue, of varying intensity, shading in parts into greenish and into 

 white on the fingers of the chelipeds. Many veiy small specimens have the 

 fingers of the larger cheliped but little developed, not exceeding the palm in 

 length, and closely approximated to each other. 



At first I thought these to be a distinct variety, but now believe them to be 

 the young of the same species, as they agree in every other particular, and 

 some show evidences of a change in the relative proportions of the palm and 

 dactyli as growth progresses . 



No. 86. Male and female, in spirits. Bartolome Bay. Fisher and Lock- 

 ington. 



GECARCINID^. 



Cardiosoma crassum. ? S. I. Smith, loc. cit., 144; pi. v., f. 5. Gulf of Fon- 

 seca, "W. C. Cent. Amer. La Paz, Lower California. 



A single fine male specimen from the latter locality agr-ees in most par- 

 ticulars with the figure and description referred to, but the carina of the 

 lateral margin is much less distinct and high ; and the larger hand differs in 

 form. 



As the specimen exceeds in size any of those measured by Mr. Smith, I 

 think it possible that the differences referred to may be owing to the greater 

 age of the individual; but as it may possibly prove to be a different species, 

 I append a description of the chelipeds. 



Merus and carpus as in C. crassum; larger hand short and broad, the depth 

 exceeding the length of the superior margin. Propodal finger slender and 

 straight, slightly spoon-shaped at extremity, with a large tooth near the 



