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 1 that specimens from the West Indian and Florida Keys do not differ from 
those collected at the Reefs of the Abrolhos at Caravella, Province of Bahia, Brazil, by 
Hartt, but he says that “ the American species is, however, very likely distinct from the 
true Gonodactylus chiragra, from the Old World,” although he gives no reason for this 
opinion. A. Milne-Edwards 2 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 graphurus, Miers, Edw. J., On some new or undescribed Crustacea from the 
Samoan Islands, Ann. and Mag. Nat. Hist., ser. 4, vol. xvi. p. 344, 1875. 
Gonodactylus graphurus, Miers, Edw. J., On the Squillidse, Ann. and Mag. Nat. Hist., ser. 5, 
vol. 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. Rostrum 
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 dorsally. 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 swollen 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 with a protuberant hemi- 
spherical eminence, upon which are five very broad convex carinse, 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 line 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. 2 Nouv. Arch. Mus. Hist. Nat., t. iv. p. 65, 1868. 
