50 Bulletin Vanderhilt Marine Museum, Vol. V 



articulations, the larger one, multiarticulate and with a dense brush 

 of long setae. The interantennal septum is very narrow. 



The antennae are adjacent to the antennulae and have the basal 

 article short and wide, the second article oblong, large and quite wide 

 with its outer surface convex and its inner distal angle produced in a 

 curved, hook-like process, that lies around the side of the third article 

 which is quite short and bulbous ; the flagellum is quite long and slen- 

 der, about 3.2 mm. long. 



The eye is fairly large, the stalk semi-concealed ; the cornea black, 

 terminal, hemispherical. 



The external maxillipeds are very tomentose and have the distal 

 meral margin nearly straight with the angles a little rounded. 



Keferences: Dromia unidentata Ruppell, Besch. und Abbild. von. 

 Art, Krabben, p, 16, taf. 4, fig, 2, 1830, 



Dromidia unidentata Kossman, Zool. Ergebn, Reise Kusten des Rothes 

 Meers, Bd. II, heft 1, Lief., p, 67, 1877, — de Man, Journ, Linn, 

 Soc. London, Zool., p. 207, 1887-88.— Nobili, G., Ann. Sei. Nat. 

 9 ser. t. IV, p. 145, 1906.— Rathbun, M. J., K. Danske Vid, 

 Selsk. Skr, 7th raekke, Bd. 5, p, 867, 1910,— Laurie, R. D., Cey- 

 lon Rept. Pearl Oysters Fish. vol. V, p. 35, 1906.— Calman, W, 

 T., Trans. Zool, Soc. London, vol. 22, p. 211, 1926-1929. 



Sub tribe : Brachygnatha. 



Superfamily: Brachyrhyncha. 



Family: PORTUNIDAE. 



Subfamily : Caphyrinae. 



Genus : LISSOCARCINUS White. 

 Lissocarcinns elegans, new species. 



Plate 16. 



Type : One male, taken at Teviatoa Reef, Raiatea, Society Islands, 

 August 21, 1931, by the "Alva." Deposited in the Vanderbilt Marine 

 Museum. 



Distribution: At present restricted to the type; member of a 

 genus known from widely separated areas of the IndoPacific and west- 

 ward including the Red Sea. 



Color: The color of the living crab was unfortunately not re- 

 corded ; the alcohol-preserved type is a deep old ivory. 



