540 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 50. 



Carapace subtriangular, with a long rostrum of two divergent 

 spines, equal to half the length of the remainder of the carapace; 

 surface deeply channeled so as to leave 17 smooth, thinly setose, raised 

 islets, as follows : One elongate-oval on the gastric region ; one trans- 

 versely subcircular, on the cardiac region; one in the shape of a 

 Cupid's bow along the posterior border ; two narrowly subtriangular 

 on each branchial region, the point of the triangles directed outward 

 and extending laterally beyond the line of the carapace, especially so 

 in the case of the posterior of these two islets; an L-shaped hepatic 

 and postocular islet ; one semilunar preorbital ; one oval subhepatic ; 

 two subbranchial, one of which is oval, the other elongate-spatulate. 

 A tubercle in front of the gastric islet and either side of the cardiac 

 islets ; they and the channels are denselj^ setose. 



Chelipeds stouter than ambulatory legs and nearly as long as cara- 

 pace and rostrum ; merus very bluntly angled above, carpus with tAvo 

 blunt crests above, man'us with one ; maniis tapering distally ; fingers 

 meeting at the tips, dactylus with an enlarged tooth at base. . Of the 

 nmbulatory legs the first is much the longest, exceeds the cheliped by 

 the dactylus and nearly half the propodus ; legs subcylindrical, carpal 

 segments with a longitudinal depression. 



Relationship. — Very much like S. stinipsoni (Miers)^, except that 

 the branchial islet is divided into two and the merus joints of cheliped 

 and legs are not sharply cristate as in that species. , 



SPHENOCARCINUS AURITUS, new species. 



•Type-locality. — East coast of Luzon : Atalaya Point, Batag Island, 

 S. 65° E., 5.1 miles; lat. 12° 43' 51" K; long. 124° 58' 50'' E.; 308 

 fathoms; gn. M. ; temperature 45.3° F. ; station 5444, Albatross. 



Ilolotype.—Oyigevous female. Cat. No. 48211, U.S.N.M. 



MeasureTnents. — Entire length of carapace, 17.3 ; length of rostrum, 

 3.3; greatest width of carapace, 11.4. 



Carapace and rostrum subtriangular, the rostrum shorter than in 

 any other species of the genus and composed of two flattened, some- 

 what ear-shaped horns which are contiguous nearly to the tips. 

 Channels of the carapace covered Avith low, spherical seta? and some 

 lines of longer, curved hairs. Islets flattened and 14 in number as 

 follows: One gastric, longitudinal, oblong with a little transverse 

 piece joined to the rear; one cardiac and intestinal in the form of a 

 large T with the ends of the crosspiece curved backward and inward ; 

 on either side of this, one narrow-subspatulate, and parallel to the 

 post-lateral margin of the carapace; one branchial, elongate, irregu- 

 lar, following lateral margin of carapace and touching the hepatic- 



1 Oxyplcurodon stimpso7ii Miers, Challenger Rept., Zool., vol. 17, 188G, p. 38, pi. 6, 

 figs. 1-lc. 



