144 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



as the fifth and has the posterior margin straight in the median 

 region, produced to a triangular process which projects over the 

 lateral part of the telson and is concavely excavate outside this tri- 

 angle, above the base of the uropod. The telson is only one and one- 

 third times as long as the sixth segment, triangulate, convex on the 

 dorsal surface and armed with two, submedian pairs of short, articu- 

 lated spines, the first of which is placed about not quite midway the 

 telson, the distal pair being halfway between the first pair and the 

 apex of the telson, which is triangulate, armed at each side with two 

 articulated spines, the inner of which is the longer and with a dense 

 brush of long, plumose setae. The uropoda have the basal article 

 small, notched medially in the distal margin ; the blades are of equal 

 length, both extending beyond the telson and of an oval shape, the 

 inner blade being slightly narrower than the outer; the outer blade 

 has the distal third separately articulated and a tooth on the outer 

 lateral margin of the proximal article. Both blades are fringed with 

 long, stiff, close-set setae. 



The eyes are close-set, spherical ; the stalk short, the cornea terminal, 

 black. 



The inner antennae have the basal article excavate beneath the 

 eye and extending slightly beyond the eye, with the lateral and distal 

 margins ciliate ; the second and third articles are short, cylindrical, 

 distally ciliate on the upper margin; the flagellum is composed of a 

 single inner whip, consisting of fifty rings, and a biramose outer whip, 

 the longer, thicker branch of which is subequal to the inner whip and 

 consists of many rings ; the shorter branch of this biramose flagellum 

 is very short. 



The external antennae have the basal article short, with an acute 

 spine at the lower, outer distal angle ; the scaphocerite is oval, extend- 

 ing beyond the peduncle of the inner antennae as far as the tenth 

 ring of the flagellum. There is a longitudinal groove paralleling and 

 near the outer lateral margin of the scaphocerite, which terminates 

 subdistally at the acute tooth on the outer lateral margin ; the distal 

 margin is broadly rounded and ciliated; the second and third 

 peduncular articles are short and are concealed beneath the scapho- 

 cerite ; the flagellum is stocky. 



The external maxillipeds are slender, leg-like, elongated and bris- 

 tling with stiff setae. 



The first legs are small, slender, when extended, reaching to beyond 

 the scaphocerite for half its length. The merus and carpus are very 



