REPORT ON THE BRACHYURA. 271 



Genus Xanthias Rathbun, 1897. 

 (=Xanthodes Dana, preoccupied). 



Carapace oval or suboval, narrower than in Lefitodiiis. 

 areolate, granulate, convex in an antero-posterior direction: 

 front and orbits as wide as in Leptodius; basal antennal joint 

 barely touching the projection from the front; lateral teeth 

 usually four (sometimes three) besides the orbital angle, 

 small, subequal. Chelipeds more or less granulate; carpus 

 with a groove next the manus; palms thick; fingers bent down, 

 little or not gaping ; ambulatory legs granulate or denticulate 

 above. Type, X. lamarckii (Milne Edwards). Here belong 

 of American species X. taylori (Stimpson), sulcatus (Faxon), 

 ■politus Rathbun (as Jficroftanofte),granitlimanii$ (Stimpson as 

 Pilumnns), and probablv also xantusii and insculfitus (Stimp- 

 son) and latus (Faxon as Ranofleus). 



78. Xanthias nuttingi Rathbun sp. now PI. iv, Fig. 1. 



Bahama Banks, from millepores; numerous. Station 46, 

 off Key West, shallow- water. 



Carapace suboval. convex in an antero-posterior direction, 

 nearly flat in a transverse direction; anterior half rough with 

 scaly granules; regions distinct. Front convex, with two 

 lobes with granulate margins, separated by a V-shaped sinus. 

 Antero-lateral margin with three sharp-pointed teeth besides 

 the orbital, which is obliquely truncate and not prominent: the 

 posterior tooth is the smallest. Margin of orbit and lateral 

 teeth granulate. The outer fissure of the orbit is broad and 

 V-shaped. 



Chelipeds heavy, unequal; meri spinulous on upper edge; 

 carpi covered with bead-like tubercles, with a deep anterior 

 groove and a small inner tooth terminating in a spinule. Manus 

 of larger cheliped in male with the upper and about two-thirds 

 the outer surface ornamented with bead tubercles; lower one- 

 third and distal extremity smooth and shining; fingers broad, 

 not gaping, brown with light tips; dactylus with a large basal 

 tooth; color of pollex not running back on the manus, but 

 forming a line with the articulation of the dactylus. Manus 



