22 
THE VOYAGE OF H.M.S. CHALLENGER. 
Falklands, ranges northward along the western shores of South America to Peru, and 
occurs also, according to Professor Bell, on the coast of Brazil. It is most abundant in 
shallow water, but occurs at greater depths, 30 to 70 fathoms. 
I have described below a species, Eurypodius longirostris, from Chiloe, which must 
be regarded as provisionally distinct, and was obtained in much deeper water (175 
fathoms). 
Eurypodius latreillei, Guerin-Meneville (PI. IV. fig. 3). 
Eurypodius latreillei , Gu6rin-MeneviUe, Mem. Mus. Hist. Nat. Paris, voL xvi. p. 354, pi. xiv., 
1828. 
„ „ Milne Edwards, Hist. Nat. Crust., vol. i. p. 284, 1834 ; Crust, in Cuvier, 
Regne Animal (ed. 3), Atlas, pi. xxxiv. bis, fig. 1. 
„ „ Miers, Proc. Zool. Soc. Lond., p. 64, 1881, et synonyma. 
Among the males in the extensive series brought home by the Challenger two very 
distinct varieties, if not species, may be distinguished by the form of the chelipedes. 
In the first (var. a), which is to be regarded as the typical form, as shown by Gudrin- 
Meneville’s original figure, the palm is moderately compressed, more slender, considerably 
longer than broad, not turgid, and the fingers are without strong tubercles on the inner 
margins (see PL IV. fig. 3). 
In the second variety (var. ft, fig. 3a) the palm is shorter and much more turgid, 
the fingers have between them (when closed) a much larger hiatus, and the dactylus and 
sometimes the lower finger (pollex) is armed, on its inner margin, near the base, 
with a strong rounded tubercle. This form has usually, but not invariably, a more 
slender carapace and longer rostrum. I cannot refer it to any of the so-called “ species ” 
figured and described by authors, reference to which is made in my paper above cited, 
where also mention is made of a specimen of this variety presented to the British 
Museum by Dr. R. 0. Cunningham. In the Challenger series are specimens of 
comparatively small size presenting this peculiarity in the form of the chelipede, 
e.g., one from Magellan Strait, dredged in 55 fathoms (Station 313), whose principal 
dimensions are as follows 
Adult <J. 
Length of carapace to base of rostrum, 
Length of rostrum, about 
Greatest breadth of carapace, about 
Length of a chelipede, about . 
Length of second ambulatory leg, nearly 
It is, therefore, not a character peculiar to the old and large males ; nevertheless, as 
some specimens of the typical form occur presenting some approach to this variety in 
the greater convexity of the palm, and as, moreover, it is impossible to say to which of 
Lines. Millims. 
81 18 
3 6-5 
61 14 
141 30-5 
29 61 
