180 Bulletin, VanderhiU Marine Museum, Yol. II 



Material examined : Three females from Miami, Florida, January 

 26, 1926. One young specimen and one large male from Guantanamo 

 Bay, Cuba, February 8, 1924. One large male and female dredged 

 in seven fathoms on sandy bottom. Double Headed Shot Cay, Cay Sal 

 Bank, Bahamas, February 18, 1925. All taken by the ''Ara," William 

 K. Vanderbilt, commanding. 



Technical description : Carapace oval, 51 mm, long, 81 mm. maxi- 

 mum width, moderately convex, finely pubescent; frontal margin 21 

 mm. wide, armed with six teeth in addition to the orbital teeth; all 

 six of these teeth are about of equal length, but the convex line of the 

 frontal margin causes the median pair to appear slightly longer; the 

 median pair are acute, triangulate, separated from each other and 

 from the adjacent pair of teeth by wide U-shaped sinuses ; the second 

 pair of teeth are also triangulate but are much wider basally and are 

 separated from the outer pair by a much deeper U-shaped sinus ; the 

 third or outer pair of teeth approximate the median pair in size and 

 are separated from the preorbital tooth by a shallow, unequal-sided 

 U-shaped sinus. The preorbital tooth is little more than half as long 

 as the others and is triangulate. The superior orbital margin is broken 

 by two small, distinct V-shaped sinuses. The inferior orbital tooth 

 is triangulate, prominent in a dorsal view, nearly as large as the an- 

 terolateral teeth. There is one distinct, V-shaped sinus, margined on 

 each side by a denticle on the inferior orbital margin. The antero- 

 lateral margin is convex and is armed with nine teeth, including the 

 postorbital tooth ; the first eight are approximately equal, triangular, 

 acute, with the tip forward-directed ; the ninth or postlateral spine is 

 but very little larger than the preceding ones in old specimens; in 

 young, it is noticeably longer. The postlateral spines are short, con- 

 cave ; the posterior margin is relatively straight. The dorsal surface is 

 convex and granulate, with a few finely beaded ridges, and is finely, 

 evenly pubescent. The epistome has a median tooth. 



The antennulae fold transversely beneath the frontal margin. 



The antennae have the basal article in the infraorbital sinus, the 

 free peduncular articles cylindrical, the flagellum about twice the long 

 diameter of the eye. 



The external maxilliped had the rod-like exognath not quite reach- 

 ing the outer distal angle of the merus and armed on its lateral mar- 

 gin with a triangular tooth that fits beneath the merus ; the ischium is 

 one and one-half times as long as wide, with a longitudinal groove on 

 the outer face, the inner lateral margin slightly convex; the distal 



