1877.] COLLECTION MADE BY H.M.S. ‘ PETEREL, 73 
will be seen to be considerably more elevated than in rubicunda. 
The colour of the latter is rather paler, except the apex, which is 
perhaps a trifle deeper in tint. 
V. Crusracra. By Epwarp J. Miers. 
But little attention has hitherto been paid to the Crustaceans of 
the Galapagos archipelago, except as regards the Oxyrhyncha (vide 
Bell, Zool. Trans. ii. p- 39 et seg. 1841); and Commander Cook- 
son’s collection contained four species only, two of which are well 
known and widely distributed, the two others being undescribed. 
1. Leproprus COOKSONI, n. sp. (Plate XII. fig. 1.) 
Carapace smooth, transverse, scarcely at all convex, surface every- 
where finely punctulated, the punctulations more crowded upon the 
anterior part. Frontal margin with the median fissure distinct, ob- 
securely 4-lobed. The frontal, gastric, and antero-lateral regions areo- 
lated, the areolets and intervening fissures well defined. Antero- 
lateral margins obtuse and rounded, the tooth at the external orbital 
angle and the first marginal tocth quite obsolete, the three following 
teeth having the form of obscure rounded lobes. Posterior to the last 
tooth or lobe of the antero-lateral margin are two or three short, 
obscure, transverse lines. Anterior legs very strong, granulated ; 
wrist and upper and outer surface of hand with numerous raised 
reticulating lines ; a blunt tooth at the antero-internal angle of the 
wrist, and a slight ridge on the upper and inner margin of the hand, 
terminating posteriorly in a tubercle. Fingers black. Ambulatory 
legs short, smooth, and without hairs, except on the tarsi, which are 
closely tomentose. Abdomen of g 5-, of 2 7-jointed. Length of 
carapace of $ about +, in. Breadth 4 in. 
Hab. Charles Island. 
A single, apparently adult male is in the collection, and a female, 
much smaller. Their colour (in spirits) is dark reddish brown. 
This species has altogether the external aspect of a Xanthodius, but 
has not any trace of the ridge upon the palate, the character upon 
which the genus was founded by Stimpson. It is to be noted that 
in Xanthodius this ridge is not produced to the anterior margin of 
the buccal area, and, therefore, does not completely define the 
branchial channel ; so that in fact the genus Xanthodius occupies an 
intermediate position between the Chlorodiinze, in which the palatal 
ridge is entirely absent, and the Oziine, in which it is fully de- 
veloped. 
2. GRapsus pictus. 
Pagurus maculatus, Catesby, Nat. Hist. Carolina, ii. pl. xxxvi. 
fig. 1 (1743). 
Grapsus pictus, Latr. Hist. Nat. Crust. vi. p. 69 (1803): M.- 
Edw. Hist. Nat. Crust. ii, p. 86 (1837). 
Hab. Charles Island. 
One specimen of this species, an adult male (length 23 in., breadth 
