1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 485' 



limits of the braiu-liial ami intestinal regions. The carapace is tliickly 

 studded with blunt spines, each terminating- in a Hatteneil face or sur- 

 face cut obliquely to the surface of the carapace; this face is encircled 

 by a fringe of short stiff" bristles. The rostrum consists of a simple 

 median si)iue with two basal spines. lender the rostrum proper there 

 is a very short conical spine homologous with the subrostral spine of 

 Lithodes; behind the spine are one or more spinules. The abdomen 

 in the male is composed, after the second segment, of several rows of 

 leathery plates; the second segment is better calcified and harder. 

 The abdomen of the female is twisted to the right as in Lithodes. 



The chelipeds are moderately slender and extend almost to the distal 

 end of the carpal joints. The spines on the inner margin of the carpal 

 segments are the most i)rominent. The ambulatory legs are long and 

 slender and thickly set with spines. The spines of the merus are not 

 so distinctly arranged in rows as on thecarY)al and propodal segments; 

 there is, however, a distinct row on the upper margin. The spines of 

 the carpus are arranged m eight more or less distinct rows; on the pro- 

 podal segment the spines are arranged in six full rows and two half 

 rows. There are four short rows of spines on the proximal end of the 

 dactylus. The dactyli are compressed, slightly bent and a little twisted. 

 An average-sized specimen measures 80 mm. in length, 78 mm. in 

 breadth, and the distance from tip to tip of the ambulatory legs is 300 mm. 



Types.— :So. 18535, U.S.N.M., oft" Queen Charlotte Islands, British 

 Columbia, station 2860, 870 fathoms. 



LEPTOLITHODES PAPILLATTJS, new species. 



From the Albatross dredgings oft' Lower California, or perhaps south 

 of that region, there is a male specimen of Leptolitliodrs without a label. 

 It is much larger than any other species in the collection, and while 

 diff'ering materially is yet very closely related. 



The carapace is broader than long; the areolations are well marked. 

 The gastric region has no spine, and is not protuberant as in L. niulti- 

 spinus. The cardiac region is much shorter; the depressions run into 

 one which extends to the margin of the carapace at tlie middle of the 

 ]>osterior border. In /.. multisphtus the grooves run separately back to 

 the posterior border, with the posterior point of the cardiac region 

 between them. There are no spines on the dorsal surface or margin of 

 the carapace; even the anterior angles lack spines. From the spines 

 at the external orbital openings to the posterior margin thei'e are small 

 tubercles or papillii^ on the margin. In the center of some of these 

 tubercles by the aid of a lens a very small horny point can be seen sur- 

 rounded by bristles. The surface of the carapace is tliickly set with 

 these small papilhie which bear stift" setie irregularly scattered over the 

 summit. In L. asper (Faxon),* the papilhe are encircled with a crown 

 of stift' seta?. 



' Bull. Mus. Comp. Zool., xxiVj p. 1G4, 1893. 



