136 Bulletin, Vanderbilt Marine Museum, Yol. II 



The antennae has the basal article fitted within the infra-orbital 

 sinus, the tapering flagellum being scarcely equal in width to the long 

 diameter of the orbit. 



The external maxillipeds have the exognath extending to the distal 

 angle of the merus ; the ischium is rectangular with the distal margin 

 slightly sinuate, a longitudinal groove on its outer face ; the merus is 

 about half as long as the ischium, with the inner distal margin slightly 

 produced; the distal angle truncated for the reception of the palp, 

 the inner lateral margin a little oblique. 



The eye has a short, stocky stalk, constricted medially; the cornea 

 is small, terminal. 



The chelipeds are decidedly unequal in the male; the merus has a 

 decided transverse groove subdistally on the upper surface ; its upper 

 lateral margin is granulate proximally, dentate distally, an acute sub- 

 distal and a distal tooth ; the carpus is large, round, convex, the upper 

 surface covered with sharp spines, an especially long one occurring at 

 the inner lateral angle. The large cheliped has the palm one and one- 

 half times as high as that of the smaller cheliped ; both palms have the 

 upper and outer surface moderately convex and covered with approxi- 

 mately longitudinal rows of denticle-like tubercles, those along the 

 upper margin being quite sharp, while the lower ones are more 

 rounded. A few denticles occur on the base of the upper fingers. The 

 fingers are deep brownish-black, the color not extending upon the palm. 

 Each finger has three or four large teeth; the fingers fit closely with 

 down-curved tips. 



The ambulatories are moderately stout, the last pair much shorter 

 than the other three pairs. The distal part of the meral, the carpal 

 and the proximal part of the propodal joints are set with a row of 

 sharp spines, the dactyli are long, slender, sharp-tipped. All of the 

 ambulatories are covered with long, stiff, ocher-j^ellow setae. 



Synonymy. — Pilunmus agassizii Stimpson, Bull. Mus. Comp. Zool., 

 vol. 2, p. 142. 



Lobopilumnus agassizii A. Milne Edwards, Miss. Sci. Mex., vol. 5, p. 

 298, pi. 52, fig. 4, 1880.— Rankin, Ann. N. Y. Acad. Sci., vol. 12, 

 p. 529, 1900. 



For the subspecies, L. agassizii var. hermudensis Rathbun, and syn- 

 onymy, see Boone, Bull. Bingham Oceanog. Coll., vol. 1, art. 2, 

 p. 23, 1927. 



