212 Bvlletin Vanderbilt Marine Museum, Vol. VI 



stylet-like, distally flanked by a pair of strong spines, one being 

 on each side of the telson apex. The uropoda have the inner blade 

 narrowed, crenulate, the outer blade slightly wider, both being a 

 little longer than the telson. 



The eye is very distinctive, the cornea being 2.4 times as long 

 as wide, or approximately as long as the height of the carapace ; 

 the stalk is definitely shorter than its distal width and terminates 

 distally on the dorsal end in a small papilla. The cornea is 2.4 

 tim.es as long as the width across the center and is approximately 

 cylindrical, with both ends convex, the lower end being five per- 

 centum wider than the upper half. The lower almost half of the 

 eye is constricted transversely just below the center of the eye, 

 and this lower portion consists of smaller facets, closely-set ; the 

 median, constricted portion is composed of slightly larger facets, 

 also closely-set and beyond this, the dorsal end of the eye is com- 

 posed of coarser facets, in berry-like formation. 



The male antennules have the basal article laminate, greatly 

 elongated, and terminating in an acute tooth at both the inner 

 and outer distal angles ; the second article is little more than half 

 as long as the first and the third article is almost as long as and 

 similar to the second article; the outer branch of the flagellum 

 has a tapered, much thickened proximal article that is about one 

 and one-half times as long as the third article and bears a brush 

 of setae on the upper distal margin, beyond which the longer 

 distal portion of the whip becomes quite fine. The inner flagellum 

 is snbequal to the outer one in length but is fine throughout its 

 entire length. 



The antennae support each a slender scaphocerite, which ex- 

 tends a little beyond the second peduncular article of the anten- 

 nulae in the female and to midway the third peduncular article 

 in the male and terminates in each, in a minute denticle at the 

 outer lateral margin, and has the inner distal margin unevenly 

 rounded and ciliate; the scaphoc^erite is about fifteen times as long 

 as the average width. The antennal flagellum is broken in the 

 specimens of the "Alva" series ; Sars states that this is **prodigi- 

 ously elongate, perhaps several times as long as the body." 



The second pair of legs is greatly elongated, being a little 

 longer than the entire body, which they exceed by about two- 

 thirds of the length of the false chelae. The latter, in the male, 

 has the structure shown in Plate 61, figure B. The palm-like 



