62 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



ment is only about half as long as the second and has the lateral plates 

 tapering, with an acute angle anteriorly and the posterior margin 

 convex; the fourth segment is similar to the third but much smaller, 

 with the lateral parts more abbreviated ; the fifth segment is quite 

 narrow but longer than the fourth, with the lateral margins oblique, 

 convergent posteriorly ; the sixth segment is small, squarish ; the telson 

 of the female is broadly heart-shaped, almost subcircular, with a me- 

 dian, longitudinal suture proximally ; the rhipidura have the peduncle 

 about as long as the sixth segment and thick, slightly wider distally; 

 the blades are oval, ciliate marginally, slightly unequal, the inner 

 being the wider, with its postlateral side more convex than the oppo- 

 site side ; the outer blade is narrower proximally but more evenly oval ; 

 both are strongly ciliated. 



The female abdominal appendages are attached to the third, fourth, 

 and fifth segments and are very long, two-branched. 



The ocular plates are large, squarish, with the angles rounded, the 

 margins crenulated and ciliated. 



The antennulae are almost twice as long as the carapace and very 

 setif erous ; the first article is of a curious, irregular shape, concave 

 on the upper surface ; the second article very wide on its outer face, 

 of curved, irregular shape; the third article is small, laterally com- 

 pressed, its inferior margin convex; the inferior branch of the flagel- 

 lum is extremely rudimentary, consisting of a long and a short ring, 

 setose ; the superior flagellum consists of 91 joints, each of which bears 

 on its inferior and superior margin a comb of five long setae. 



The antennae are small, the tip reaching little more than a third the 

 length of the antennulae; the proximal joint stocky, a spine on its 

 outer margin ; the acicule is small, lanceolate, the remaining articles 

 successively decrease in size ; the flagellum is composed of eight stocky, 

 laterally compressed, tapering rings and has a brush of long setae on 

 the under side. 



The first legs are chelate, the merus large, suboval, thick, arched 

 to fit against the body, the carpus is elongate, with the outer surface 

 slightly convex and with several transverse rugae ; the propodus is 

 greatly flattened and widened and curiously shaped ; the lower margin 

 is carinate and slightly convex, the tip is curved, acuminate, and the 

 cutting edge is very convex and setose; the free upper margin is 

 deeply rounded, and the attached proximal margin is angled, corre- 

 sponding to the angle of the carpus ; the finger is very slender, long, 

 curved, sickle-shaped, with its outer margin fringed with setae. 



