452 bulletin: museum of comparative zoology. 



hairs on upper margin ; a spine on the anterior margin of the carapace 

 above the base of the antenna. 



Eyes short, stout, subcorneal, with the end of the cone rounded, 

 and an acute tubercle on the outer side of the summit; eyes without 

 pigment. 



Antennules more than 1| times as long as the body; peduncle very 

 slightly longer than the rostrum; first segment as broad as long, 

 antero-external spine broad, reaching past the middle of the second 

 segment; second segment broader than long; third segment about as 

 broad as long. 



Antennae about 2\ times as long as the body, the peduncle falling 

 short of the end of the first segment of the antennules; the first seg- 

 ment of the antennae bears a sharp spine on its anterior margin just 

 below the outer angle; scale broad, subovate, reaching a little beyond 

 the antennular peduncle, and armed with a small spine near its outer 

 extremity. 



The incisor process of the mandible has a bidentate tip, the molar 

 process has the extremity partially dentate (Plate 1, fig. 4). 



The outer maxillipeds if extended would reach beyond the antennal 

 scale by the length of the last segment. 



First pair of pereiopods slender, reaching beyond the scale by the 

 length of the propodus and half the carpus; ischium expanded below 

 except at proximal end; merus and carpus subequal, carpus a little 

 the longer, widening distally; palm slightly dilated, exceeding the 

 carpus in width somewhat; fingers lj times as long as palm, tapering 

 only near the tip. 



Second pair of pereiopods as long as the body; ischium no wider 

 than merus and § as long; carpus a little longer than merus and widen- 

 ing from the proximal to the distal end; palm much swollen; fingers 

 slender and of even width to near the tips, 1| times as long as palm, 

 scarcely longer than carpus, prehensile edges thin, corneous, trans- 

 lucent, unarmed except near the base, where the dactylus bears a 

 shallow lobe followed by a small tooth, both of which fit closely 

 against a complementary tooth on the fixed finger; tips corneous, 

 crossing well past each other. 



Third, fourth, and fifth pairs of pereiopods subequal, long and blen- 

 der, the fifth pair reaching beyond the scale by the length of the 

 dactylus and one half the propodus. 



Postero-lateral angle of fourth segment of abdomen almost a right 

 angle; of fifth and sixth segments acute; sixth segment slightly 

 longer than broad; telson 1| times length of preceding segment, dor- 



