400 PROCEEDINGS OF THE NATIONAL MUSEUM VOf/. 89 



Rostrum distinctly narrower at base than at midlength, converges 

 slightly anteriorly to form a small lateral tooth on either side, which 

 does not reach distal end of second joint of peduncle of antennule. 

 Upper surface deeply excavate. Acumen extends slightly distad of 

 second joint of peduncle of antennule. Postorbital ridges ter- 

 minating anteriorly in short spines. 



Surface of carapace punctate dorsally and tuberculate laterally; 

 one or two tubercles immediately posterior and laterad of the cervical 

 groove slightly larger than others. 



Abdomen smooth, slightly narrower, and shorter than ceplialo- 

 thorax. Anterior section of telson with three spines in each of the 

 posterolateral corners. 



Eyes reduced, not pigmented. 



Epistome small and minaret shaped, with a small anteromedian 

 spine. Margins slightly raised and unbroken. 



Antennules of usual form; a spine present on ventral side of basal 

 segment. 



Antennae broken but probabl}' longer than body. 



Antenna! scale broad; extends cephalad to tip of rostrum; broadest 

 slightly distad of middle. Spine on outer margin strong. 



First pereiopod long and slender; palm subovate, entirely tuber- 

 culate. Fingers bent ventrad without well-defined dorsomedian 

 ridge. About 13 tubercles in silhouette irregularly arranged along 

 inner margin of palm. 



Movable finger with about 22 tubercles along mesial margin ; lateral 

 margin with about 20 or 21 low tubercles along proximal half. Entire 

 lateral margin with minute denticles. 



Immovable finger with about 11 tubercles along proximolateral 

 margin; about 18 tubercles along the proximal dorsomesial margin. 

 Opposite the fifteenth and between the sixteenth and seventeenth 

 are two larger corneous tubercles along the ventromesial margin. 

 Entire mesial margin with minute denticles. 



Carpus about 1.8 times as long as wide; a shallow gi'oove above. 

 Entirely tuberculate, although sparsely so dorsad and ventrad. One 

 large spine on the anterior mesio ventral margin. 



Merus plain proximolaterad, otherwise tuberculate. Tubercles 

 spikeiike ventrad and dorsodistad. 



Ischiopodites of third and fourth pereiopods with strong simple 

 hooks. 



First pleopod extends to base of third pereiopod ; tip terminates in 

 four distinct parts, which are bent at about a 60° angle with the main 

 shaft. The mesial process, which arises from the mesiodistal margin, 

 is spiculiform. The cephalic process is an elongate, acute process 

 with a broad base, which extends across the anterodistal tip of the 

 appendage, hooding the central projection, Th^ central projection 



