58 THE VOYAGE OF H.M.S. CHALLENGER. 



of the telson, as well as slight differences in the colour of the alcoholic specimens from the 

 two previous localities. 



Smith says ^ that specimens from the West Indian and Florida Keys do not differ from 

 those collected at the Eeefs of the Abrolhos at Caravella, Province of Bahia, Brazil, by 

 Hartt, but he says that " the American species is, however, very Ukely distinct from the 

 true Gonodactylus chiragra, from the Old World," although he gives no reason for this 

 opinion. A. Milne-Edwards^ records it from the Mediterranean, and coasts of America, 

 Africa, Asia, and Oceania. Miers says that he has examined a specimen four inches long 

 from New Guinea. 



Gonodactylus graphurus, Miers (PI. XIV. figs. 1, 4, 6 ; PI. XV. figs. 3, 8). . 



Gonodactylus grapliums, Miers, Edw. J., On some new or undescribed Crustacea from the 

 Samoan Islands, Ann. and Mag. N"at. Hist., ser. 4, vol. xvi. p. 344, 1875. 



Gonodactylus graphurus, Miers, Edw. J., On the Squillidse, Ann. and Mag. Nat. Hist., ser. 5, 

 Tol. v., 1880, p. 120, pi. iii. fig. 9. 



Gonodactylus graphurus, White, List of Crustacea, Brit. Mus., 1849, p. 85 (no description). 



Gonodactylus graphurus, Miers, Edw. J., ^Malaysian Crustacea, Ann. and Mag. Nat. Hist., ser. 5, 

 vol. V. p. 459, 1880. 



Diagnosis. — Dactylus of raptorial claw without teeth and dilated at base. Eostrum 

 with a long slender acute median spine and subacute antero-lateral angles. Hind 

 body wider than the carapace, with its sides straight and parallel. Second thoracic 

 somite partially exposed dorsaUy. Lateral edges of all the abdominal somites with 

 triangular marginal carinse with the apices directed backwards. Dorsal surface of the 

 thoracic and first five abdominal somites without carinse or spines. Sixth abdominal 

 somite with a short unarmed median carina, and three pairs of swoUen convex lateral 

 carinse, all ending in spines, the second or intermediate shorter than the first and third. 

 Telson ending in six acute spines with broad bases, each one with a broad convex longi- 

 tudinal dorsal carina. Middle of dorsal surface of telson Mdth a protuberant hemi- 

 spherical eminence, upon which are five very broad convex carinae, of which the median 

 and submedian end posteriorly in acute spines, while the marginal ones are without 

 spines and shorter than the others. There is a triangular subacute prominence on the 

 anterior edge of the telson on each side, halfway between the middle fine and the lateral 

 margin, with a broad convex carina. Paddle of exopodite of uropod half as long as the 

 second joint. Basal joint of uropod with two acute spines on dorsal surface, while its 

 ventral prolongation ends in two nearly equal acute spines, with a rounded tooth on 

 inner edge of outer one near the base. Tergal surfaces of the first five abdominal somites 

 with longitudinal sutures on sides, and a transverse dorsal suture. 



General Description. — Carapace flat, hind body convex, and highly polished. 



1 Brazilian Crustacea, Trans. Conn. Acad., vol. ii. p. 31, 1869. ^ ^guy. Arch. Mus. Hist. Nat., t. iv. p. 6.5, 1868. 



