[29] DECAPODA FROM ALBATROSS DREDGINGS. 37i$ 



The carapax in front is broader than high, but much higher thaa 

 broad posteriorly, and slightly compressed above, so as to make the- 

 dorsum somewhat obtusely angular, though rounded and not at all cari- 

 nate, even anteriorly. The rostrum is usually a little shorter than the 

 rest of the carapax in large specimens, but in small specimens is often 

 nearly or quite twice as long ; it is stout at base, but rapidly tapered 

 above the first segment of the peduncle of the antennula, beyond which, 

 it is very slender, slightly upturned, and armed with six to ten teetlt 

 above and four to seven beneath, the dorsal teeth extending back as. 

 far as the orbit, and both series reaching nearly to the acute tip. The> 

 anterior margin projects in an acute, but scarcely spiniform, angle above- 

 the base of the antenna, and opposite the base in an acute and later 

 ally prominent branchiosteginl spine, below which the branchiostegite- 

 is suddenly incurved in the anterior part of the carapax. The surface^ 

 of the carapax and abdomen is naked and smooth to the unaided eye., 

 but is microscopically punctate. 



The eye-stalks are very short, and terminated by small heraisphericar; 

 black eyes. The peduncle of the antennula is short, much less than half 

 as long as the antenna! scale; the first segment is fully as long asthe^ 

 second and third taken together, is deeply excavated above, for the recep- 

 tion of the eye, and its outer edge is armed distally with a small tooth;, 

 the second and third segments are broader than long and subcylindri- 

 cal. The outer or major flagellum in the male is twice to three times;, 

 as long as the antennal scale, with the proximal portion to near the tip> 

 of the antennal scale, compressed vertically, broadly expanded, and^ 

 thickly clothed beneath with fine hairs, but the distal portion very slen- 

 der and somewhat compressed vertically. In the female the compressed: 

 and thickened proximal part is much shorter and slightly narrower and. 

 the whole flagellum a little shorter. The inferior flagellum is about as- 

 long as the upper, and slender throughout. The antennal scale is ap- 

 proxunately three-fourths as long as the carapax, excluding the rostrum., 

 and near the base about a fourth as broad as long, but narrowed regu- 

 larly to a very slender tip. The second segment of the peduncle is-- 

 armed with an acute dentiform spine below, and a triangular tooth 

 above the base of the scale. The distal segment of the peduncle' 

 reaches only about a third of the way from the base to the tip of the- 

 antennal scale. The flagellum is slender, slightly comx)ressed, and- 

 nearly as long as the body of the animal. 



The labrum is fleshy, prominent, as seen in front, and the inferior edge- 

 is thickened and slightly indurated and applied to the concave dorsal- 

 surfaces of the mandibles. The lobes of the metastome are very broadi 

 distally and somewhat truncated. The mandibles are expanded iuto^ 

 thin, dorsally concave, and strongly dentate ventral processes, above 

 and closely connected with which are small and narrow molar areas. 

 The opposing edges of the ventral processes differ somewhat on the 

 two sides : on the right side the mesial edge is slightly convex, as seen. 



