396 PROCEEDINGS OF THE NATIONAL MUSEUM vou 89 



Eyes reduced, not pigmented. 



Epistome small, margins slightly raised, with an anterior median 

 spine and a right lateral one — left lateral margin unbroken. 



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

 segment. 



Antennae extending posteriorly slightly beyond tip of telson. 



Antenna! scale broad and long, extending almost to third joint of 

 peduncle of antennule; broadest in middle. Spine on outer margin 

 strong, extending beyond tip of rostrum. 



First pereiopod long, slender, entirely tuberculate; palm ovate, 

 only slightly depressed dorsoventrally. A slight median dorsal ridge 

 along each finger. Outer margin of immovable finger with a distinct 

 ridge. 



Movable finger: Inner margin with about 12 corneous and knob- 

 like tubercles along proxunal half; the fifth from base the largest. 

 Minute denticles along entire inner margin. Mesial margin with 16 

 setiferous tubercles. Dorsomedian ridge with a single row of tubercles 

 on each side. Setae extending from base of each distally. Beyond 

 the fifteenth lateromarginal tubercle the tubercles bounding the 

 median ridge have given way to setiferous punctations, which extend 

 on to the tip of the finger on the outer row, but which are not present 

 to the tip on the mesial row. Finger terminates distally in a sharp 

 corneous tip bent laterall.y and extending below the tip of immovable 

 finger. 



Immovable finger: Inner dorsal margin with about 13 corneous 

 tubercles of which the second, third, and fourth are the largest. 

 Between the tenth and eleventh a very large corneous tubercle ex- 

 tends from the ventromesial margm and passes below the movable 

 finger when fingers are brought together. Also, opposite the twelfth 

 tubercle a smaller tubercle extends from the ventromesial margin. 

 Entire mesial margin with minute denticles. Dorsal surface uith a 

 median ridge. Lateral margin also with a prominent ridge. 



Carpus longer than wide, not so long as imier margin of palm of 

 chela; a shallow, oblique, longitudinal groove above; entu-ely tuber- 

 culate, 



Merus entirely tubercidate; ventral side crowded with spikelike 

 tubercles, 



Ischiopodites of third and fourth pereiopods with hooks. Hooks 

 on the third pereiopods rounded and straight; hooks on the fourth 

 with caudo ventral surface rounded and cephalodorsal surface ex- 

 cavate. 



First pleopod extenduig to base of the coxopodite of the third 

 pereiopod; tip terminating in four distinct parts, as follows: The 

 mesial process is long and spiculiform, directed at about a 45° angle 



