Boone, Crustacea, Cruises of "Eagle" and "Ara,'* 1921-28 37 



at its outer side by a single rounded tooth with a basal node from 

 another acute, spinose tooth which also has a prominent carina run- 

 ning in from its base for a short distance ; outside this spinose tooth 

 on the lateral margin there is midway a single blunt tooth which is the 

 terminus of a decided carina that extends along the lateral margin 

 to its base. The dorsal surface of the carapace is microscopically 

 granulate and punctate. The uropoda have the peduncle with two 

 longitudinal carinae on the proximal part and with an acute spine 

 distally at the base of the outer blade. The inner distal angle of the 

 peduncle is produced into a large blade which is a trifle longer than 

 the inner blade of the uropod and which is produced at its inner distal 

 angle to an attenuated, acuminate spine whose apex is directed pos- 

 teriorly and slightly inward towards the center and has a carinate 

 longitudinal ridge and is followed on the outer side by an unequal- 

 . sided rounded lobe which is slightly longer and broader than the inner 

 blade of the uropod and which has its proximal outer lateral margin 

 excavate and separated by a slit-like incision from the long, acute 

 spine which terminates the outer lateral angle and which has its apex 

 about as long as the adjacent, inner rounded lobe. The inner branch 

 of the uropod is small, narrow, elongate, narrowed proximally on the 

 outer side and with the distal margin evenly rounded and the entire 

 margin heavily fringed with close-set, plumose setae. The outer blade 

 of the uropoda consists of three articles, the proximal of which is 

 strong, with a heavy median ridge, its inner lateral margin convex 

 and fringed with setae and its outer distal angle with a long, acute, 

 movable spine, and with four acute, movable spines on the outer lat- 

 eral margin closely appressed to each other ; the distal article is about 

 as long as the proximal and is irregularly ovate, with a pronounced, 

 approximately median longitudinal ridge which has a parallel groove 

 on its inner side. The entire margin is heavily fringed with plumose 

 setae. Beside the distal article on its outer side at the base is a long, 

 slender, sabre-blade shaped spine, not quite half as long as the oval 

 blade beside which its concave inner margin rests. 



The eyes are large, the cornea reniform, slightly constricted medi- 

 ally and the stalk is short, bulbous, definitely constricted below the 

 cornea which is set obliquely upon the stalls. 



The inner antennae have the three peduncular articles cylindrical, 

 approximately subequal in length but of increasing slenderness dis- 

 tally ; the flagellum is triarticulate, the upper branch being about one- 

 third longer than the longer whip of the lower, two-branched flagel- 



