26 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



telsonic segment with a squarish, calcareous plate on the upper sur- 

 face, its posterior angles slightly peaked; the proximal part of the 

 telson is as wide but shorter than the preceding plate, with a median 

 longitudinal depression and with the distal margin slightly excavate, 

 the angles peaked ; the distal part of the telson is squarish, about as 

 long as the two preceding plates considered together with the sub- 

 parallel lateral margins incised medially and the distal margin a 

 rounded lobe on either side of a small median incision and with three 

 or four spinose denticulations on each half, also a fringe of close-set 

 setae. The uropoda have the peduncle strong, convex and nodulose 

 on the upper surface ; the branches decidedly unequal, auriculate, the 

 smaller outer one almost entirely covered by corneous scales ; the larger 

 one with a crescentic patch of scales along the anterior half of its outer 

 surface. The right uropod is much smaller than the left and its blades 

 are less unequal in size to each other. There are three biramose appen- 

 dages on the abdomen, each of which has the peduncle short; the 

 anterior distal blade is long and narrow, oval, heavily fringed with 

 cilia; the posterior blade is obsolete, represented by a small nodule 

 about 1 mm. long, which is obscured by the cilia. 



The ocular scale is small, wide basally and with the inner half pro- 

 duced to a convex-sided acuminate point. The eyestalks are about as 

 long as the precervical part of the carapace in the median line, cylin- 

 drical, increasing slightly in diameter distally, with a slight rounded 

 point projecting onto the cornea on the upper surface; the cornea is 

 terminal, spherical, shining black. 



The antennulae have the basal joint short, the second and third 

 articles subequal, clavate, extending to the base of the cornea; the 

 flagellum is thick, the upper branch one and one-third times as long as 

 the third penducular article, tapering, with a thick brush of setae on 

 the under side ; the inferior branch is slender, three-fifths as long as 

 the upper branch. 



The antennae are short, the tip of the flagellum not quite reaching 

 to the base of the finger of the cheliped. The first peduncular article 

 is short and wide, squarish basally with a slender, distally forked tooth 

 arising at the outer distal angle, and the acicule from the inner is 

 short, tapering, its apex directed inward; there are two acute spines 

 proximally near the inner lateral margin and two on the outer lateral 

 margin subdistally in addition to the acute apex. The inferior inner 

 distal angle of the first peduncular joint is produced beneath the sec- 

 ond article and is acuminate distally ; the second article is very short, 



