REPORT ON THE BRACHYURA. 



279 



colored pubescence, finer and less dense than in T. corallinus. 

 Regions of the carapace well-marked. Elevations smaller, 

 more numerous and less striking than in T. corallinus, and 

 covered with small conical tubercles, many of which are spini- 

 form. Slender spinules are scattered on the carapace, espe- 

 cially on the posterior half and near the lateral margins. 

 Lateral spines longer and more slender than in T. corallinus. 

 and armed with spinules. Antero-lateral spines three, the 

 third the longest. Postero-lateral spines two. Posterior mar- 

 gin armed with small spines. Front with three slender spines 

 of equal width at base, directed forward, tips broken off. 

 Orbital spines very slender, spinuliferous. the preocular hav- 

 ing a small spine at its base on the outer side. The seg- 

 ments of the abdomen in the male are all distinct; the first and 

 second have a few small spines or spinules. 



Chelipeds small and nearly equal, the right the larger; cov- 

 ered with slender setae like those on the carapace. Merus 

 not exceeding the carapace; lower and outer margin spinu- 

 lous. Outer surface of carpus and manus spinulous, with 

 larger spines at the inner angle of the carpus and along the 

 superior margin of the manus. Ambulatory legs longer and 

 more slender than in T. corallinus, pubescent; all the joints 

 excepting the dactyli bear spinules. 



Dimensions. — Male, length to base of rostral spines 26, 

 width including spines 34, width excluding spines 23.3 mm. 

 A broken carapace from station 2395 is considerably larger 

 than the tvpe. It measures 40.6 mm. in length to the base of 

 the rostral spines and 38.6 in width exclusive of spines. 



Habitat. — Gulf of Mexico. 324 and 347 fathoms, stations 

 2376 and 2395. steamer "Albatross." 



Type locality. — -Station 2376, off the Delta of the Missis- 

 sippi. 324 fathoms (U. S. Nat. Mus. No. 9639). 



This species differs from the type of the genus in the same 

 manner that the two species of Hvpopcltarium differ from 

 each other, that is, in the relative size of the chelipeds and in 

 the distinctness of the seven abdominal segments in the male. 



