412 PROCEEDINGS OF THE NATIONAL ^LUSEUM voc. 89 



Areola moderately broad and short, about six times as long as 

 broad, not depressed. Cephalic region of carapace about 3.2 times 

 as long as areola. Areola with two irregular rows and a few scattered 

 punctations. 



Rostrum without lateral spines, subovate. Margins almost parallel 

 for a short distance at base, only slightly tapering up to apex when 

 they suddenly converge to form a short tip. Apex short and small, 

 reaching base of third segment of peduncle of antennule; upper surface 

 plane, punctate, margins only slightly raised. Postorbital ridges 

 tenninating anteriorly without spines and extending posteriorly more 

 than halfway between tip of rostrum and caudodorsal margin of 

 cervical groove. 



Surface of carapace punctate, and granulate ventrolaterally, espe- 

 cially anterior to cervical groove. Lateral spines absent. Cephalo- 

 lateral margms each \\ith a strong spine near anterior extremity of 

 cervical groove. 



Abdomen almost as broad as carapace and longer than cephalo- 

 thorax. Anterior section of telson with two strong spines in each of 

 the posterolateral corners. 



Epistome (in ventral view) with margins elevated and each side 

 with two shallow emarginations. 



Antennules of the usual form. A spine present on the ventral side 

 of basal segment. 



Antennae extending posteriorly about midway of the second 

 abdominal segment. 



Antennal scale of moderate size, broadest in middle. Spine on tip 

 of outer margin strong, extending to tip of rostrum. 



First pereiopod heavy, with setiferous tubercles dorsally and 

 ventromesially. Ventrolateral surface with setiferous punctations. 

 A dorsomedian ridge on each finger, and a distinct ridge on lateral 

 margin of immovable finger. About nine tubercles present along 

 inner margin of palm. 



Movable finger: Inner margin with nine corneous, knobiike tuber- 

 cles. Beginning proximaily, tubercles 2, 4, G, and 8 are largest. 

 Between 5 and 6 and between 7 and 8 a small tubercle is present 

 dorsal to the row just mentioned; between tubercles 8 and 9 are three 

 smaller tubercles. Minute denticles scattered along inner margin 

 distad of the fifth tubercle. Finger entirely setose-punctate. Dorso- 

 median ridge prominent. Mesial margin with two small tubercles 

 along proximal fifth. 



Immovable finger: Mesial margin with 10 knoblike tubercles. The 

 proximal 6 more corneous, and range in size m the following order: 

 The third the largest; second, fourth, and fifth about the same size; 

 first, sLxth, seventh, eighth, tenth, ninth, progressively smaller. 

 Besides these a larger tubercle extends from the ventromesial margin 



