134 BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



Diagnosis. — Carapace octagonal; front entire; chelipeds cristate. 



Description. — Length and breadth of carapace subequal; hepatic 

 regions depressed; deep furrows outhne cardiac and mesogastric 

 regions. A blunt median carina extends from the front to the 

 cardiac region. Surface covered with flat close-set granules, not 

 quite so large on the anterior tlurd. Front truncate, upturned. A 

 blunt prominence at hinder end of hepatic region; directly behmd it 

 a triangular lobe or tooth on the margin of the branchial region, fol- 



FiGURE S5.—Ebalia cristata, male holotype (21599): Dorsal view, X 3)4. 



lowed closely by a smaller, similar lobe at the widest part of the 

 carapace, both lobes inclined downward; posterolateral angle fur- 

 nished with an acute denticle; behind it the margin is concave; 

 posterior margin with two shallow adjacent lobes. Of the dorsal 

 branchial prominences, the anterior one is the highest; below it a 

 ridge trends toward the nudlateral tooth; the prominence behind it is 

 irregularly broken up. In a larger male, these prominences are more 

 confluent. Pterygostomian region drawn to an acute point. Merus 

 of chelipeds cyUndrical, length less than twice thickness; carpus, 

 propodus, and dactylus with a thin, acute crest; palm swollen, lower 

 margin convex. Legs granulate, margins spinulous; dactyls long, 

 slender, fringed below. 



Measurements. — Male (17503), length of carapace 11.8, width 12.5 

 mm; male (21599), length 9.6, width 10 mm. 



Range. — West coast of Mexico. 



Material examined.' — Lower Cahfornia, Mexico: 



Oft' Abreojos Pomt; lat. 26°14'00'' N., long. 113°13'00'' W.; 48 

 fathoms; yl. M.; temperature 53.9° F.; May 3, 1888; station 2834, 

 Albatross; 1 male (21599). 



