OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 229 



Description. — Carapace slightly broader than long, regularly 

 convex, median regions well defined. Surface densely and coarsely 

 granulate, uneven or tuberculate, the tubercles arranged partly in 

 longitudinal rows. In the young the tubercles are higher than in the 

 old. Front with subtriangular, blunt, median notch, each tooth with 

 a slight lobe or tooth on outer edge. Anterolateral margin with a 

 beaded edge; five or six denticles behind orbit; a short sharp tooth or 

 spine at lateral angle. Carapace widest in front of spine. Margin 

 of arm expansion tridentate and continuous with the longitudinal 

 crest on palm which is unidentate. Nine teeth on upper margin of 

 palm; three oblique but irregular rows of tubercles on outer surface. 



Measurements. — Largest specimen, female (22125), length of 

 carapace 45.8, greatest width 49, width between tips of lateral spines 

 47.5 mm. 



Color. — Bright in life. Carapace pale yeUow or whitish with lemon- 

 yellow spots in irregular rows, and many small bright red or crimson 

 spots, especially laterally. Chelipeds and legs bright yeUow, spotted 

 and banded with bright scarlet-red; chelae with a crescent of red at 

 the articulation of the dactylus on the inside ; tips of digits and teeth 

 of dorsal crest of manus red; carpus with two red spots. Legs bright 

 yeUow, with bands of red and purple, and purplish red margins on the 

 merus; eyestalks orange. (VerriU.) 



Coral sand white with faint brownish marldngs, cinnamon or pale 

 hazel; markings sometimes inconspicuous. (Station 25, Hancock 

 Galapagos expedition.) 



Upper surface of carapace cream-buff, spines and tubercles white 

 with hinder two-thirds of larger tubercles margined with purple. 

 Eyestalks cream-buff with tinge of maize yellow, corneae gray with 

 tinge of salmon buff. Chelipeds white outside with some purple 

 spots; inside white with large maroon spot at distal end of manus; 

 hazel spot on carpus at middle of outside near upper margin. Dactyli 

 and propodi of ambulatories citron yellow, carpal joints with auricula 

 purple in a line on each side united across upper margin proximally; 

 first leg has a little spot on hind side of propodus, merus with a large 

 splotch of purple on same side. (W. L. Schmitt.) 



Variation. — The intermediate crab of the three largest Cycloes 

 from station 257 is different from the others; the eyestalks are basally 

 purple, the carapace smoother, lateral spines whiter and stronger, a 

 conspicuousVhite spine on the carpus of the cheliped; and the surface 

 has finer and fewer red specks. A fourth specimen, the smallest, is 

 like the intermediate. 



Hahit. — Burrows in sand. 



Range. — West coast of Mexico to Ecuador and the Galapagos 

 Islands; North Carolina to Caribbean Sea; Bermudas; Iji to 45 

 fathoms; 125 fathoms (Henderson). 



Material examined. — See table 74, page 230. 



