OXYSTOMATOUS xiND ALLIED CRABS OF AMERICA 247 



which no doubt act as a partial protection from their enemies. By 

 removing a large Murex from the sand a few of these crabs were located 

 underneath it at a depth of 4 inches. (S. A. Glassell.) 



Range. — Mexico; ?Peru. 



Material examined. — Mexico: 



Off Abreojos Point, Lower Cahfornia; lat. 26°42'30" N., long. 

 113°34'15" W.; 5)^ fathoms; gn. M.; May 4, 1888; station 2835; 

 Albatross; 2 males, cotypes (21597). 



Magdalena Bay; 1917; C. R. Orcutt; 1 male (50653). 



San FeKpe, Gulf of California; low tide, buried in sand; May 8, 

 1933; E. H. Quayle collector; 1 immature female (Glassell collection). 



San Felipe; May 6-15, 1933; H. N. Lowe; 1 male, 1 female (67730). 



Genus HEPATELLA Smith 



Hepatella Smith, in Verrill, Amer. Nat., vol. 3, p. 250, 1869 (type, H. arnica Smith). 



Allied to Hepaius. Carapace subrectangular, facial region promi- 

 nent, eyes very small, with short peduncles. No depression below 

 orbit. Lateral regions concave above. Chelipeds similar to those of 

 Hepatus. Ambulatory legs cristate above and below on merus, carpus 

 and propodus. 



West coast of Mexico to Peru. 



KEY TO THE SPECIES OF THE GENUS HEPATELLA 



A.^ Carapace more than one-third wider than long. Margin of front 

 thick between and outside the orbits. Lateral teeth irregular, 

 subacute arnica (p. 247) 



A.^ Carapace one-tenth wider than long. Margin of front thin 

 between and outside the orbits. Lateral teeth even, sub- 

 truncate peruviana (p. 248) 



HEPATELLA AMIGA Smith 



Plate 76, Figures 1, 2 



Hepatella arnica Smith, in Verrill, Amer. Nat., vol. 3, p. 250, footnote, 1869 

 (type locality, Panama; type in Peabody Mus., Yale Univ.). 



Description. — Carapace broad ; gastric and posterior branchial regions 

 protuberant and granulous, as is also the middle of the cardiac region; 

 rest of carapace smooth. Lateral margins nearly parallel posteriorly, 

 the edge thin and armed with about 12 irregular, sharp teeth; it 

 forms an obtuse angle with the hepatic margin which is very thick. 

 Upper margin of palms with three low, sub truncate teeth. Sternum 

 deeply punctate and vermiculate. Male abdomen very narrow, 

 acutely pointed, the third, fourth, and fifth segments fused. 



Measurements. — Male holotype, length of carapace 11.5, width 

 15.8 mm. Male (59343), length of carapace 20, width 29 mm. 



Range. — Mexico to Ecuador. 



Material examined. — See table 79, page 249. 



