REPORT ON THE BRACHYURA. 
243 
Gelcisimus rubripes, Jacquinot and Lucas. 
Gelasimus rubripes, Jacquinot and Lucas, Crust, in Voy. au Pole Sud. Zool., iii. p. 66, pi. vi. 
fig. 2, 1853. 
„ „ Milne Edwards, Ann. d. Sci. Nat., ser. 3, Zool., vol. xviii. p. 148, pi. iv. 
fig. 12, 1852. 
„ „ Kingsley, tom. cit., p. 145, pi. x. fig. 17, 1880. 
Philippines, Samboangan, 10 fathoms (an adult male). This specimen agrees well 
with the figure of Jacquinot and Lucas. 
Specimens of this species, which have two triangular teeth on the inner margin of 
the palm, might at first sight be mistaken for Gelasimus vocans, but the series referred 
to Gelasimus rubripes, in the British Museum collection, may always be distinguished 
by haying the dactylus granulated at and near the base and longitudinally sulcated on 
its outer surface. 
Adult (J . 
Lines. 
Millims. 
Length of carapace, about 
CO 
18-5 
Breadth of carapace, nearly . 
13 
27-5 
Gelasimus tetragonon (Herbst). 
? Cancer tetragonon, Herbst, Naturgesch. der Krabben u. Krebse, Heft 1, p. 257, pi. xx. fig. 110, 
1782, ?. 
Gelasimus tetragonon, Riippell, Beschreib. 24 Arten kurzscbwanzigen Krabben d. rotben 
Meeres, p. 25, pi. v. fig. 5, 1830. 
,, „ Milne Edwards, Hist. Nat. Crust., vol. ii. p. 52, 1857 ; Ann. d. Sci. 
Nat., tom. cit., p. 147, pi. iii. fig. 9, 1852. 
,, „ Kingsley, Proc. Acad. Nat. Sci. Philad., p. 143, pi. ix. fig. 11, 1880, 
where references to literature. 
Two males were obtained at Tahiti, near the reefs, and three at Papiete, in the same 
island, on the shore and at the river mouths ; also a male and two females at the Arrou 
Islands. 
This species varies much in the coloration and in the tuberculation of the larger 
chelipede, whose fingers are granulated on the inner margins and bear ordinarily two or 
three larger tubercles, but these latter are sometimes absent from the inner margins of 
one or both fingers. The coloration in the Challenger spirit specimens is purplish- 
brown, with irregular pale markings ; the chelipedes yellowish, with a large red patch at 
the base of the pollex, which extends sometimes over the whole outer surface of the 
palm. 
Adult $ . 
Lines. 
Millims. 
Length of carapace, .... 
10 
21 
Breadth of carapace, nearly 
15 
31-5 
