256 
THE VOYAGE OE H.M.S. CHALLENGER. 
female in imperfect condition (preserved dry); St. Paul’s Rocks, August 1873 (a good 
series of specimens); St. Michael’s, Fernando Noronha, on the rocks, September 1873 
(two males and two females) ; Ascension Island, on the shore (a small male) ; and St. 
Vincent, Cape Verde Islands, July 1873 (two females and two young males). 
Grcipsus maculatus, as has been repeatedly observed, varies much in the coloration 
of the carapace and limbs. The specimens in the Challenger series from Bermuda and St. 
Paul’s Rocks, which are the largest and best preserved in the collection, nearly resemble 
in colour the excellent figure given by M. H. Milne Edwards in the large illustrated 
edition of the Regne Animal de Cuvier, which is reproduced, uncoloured, in his mono- 
graph of the group in the Ann. d. Sci. Nat. (tom. cit.), and which may, I presume, 
be regarded as typical of the species. To this (the typical) variety also probably belong 
the specimens from Fernando Noronha and Ascension Island. 
The specimens from the Cape Verde Islands are perhaps referable to the variety 
described by M. Milne Edwards as Grcipsus webbi, in which the spots of the carapace are 
smaller and more numerous, but the two are connected by imperceptible gradations. 
The variety designated by Studer, Grcipsus pictus, var. ocellatus, ought not to be 
separated, I think, from the typical form. 
Adult $ . 
Lines. 
Millims. 
Length of carapace, about 
30 
63-5 
Breadth of carapace, .... 
33 
70 
Grapsus strigosus (Herbst). 
Cancer strigosus, Herbst, Naturgesch. der Krabben u. Krebse, vol. iii. Heft 1, p. 55, pi. xlvii. 
fig. 7, 1799. 
Goniopsis flavipes, MacLeay, in Smith, Illustr. Zool., South Africa, p. 66, 1838. 
Gh'apsus strigosus, Latreille, Hist. Nat. Crust, et Ins., vol. vi. p. 70, 1803-1804. 
„ „ Milne Edwards, Hist. Nat. Crust., vol. ii. p. 87, 1837; Ann. d. Sci. Nat., 
tom. cit., p. 169, 1853. 
„ „ A. Milne Edwards, Nouv. Archiv. Mus. Hist. Nat., vol. ix. p. 286, 1873. 
„ „ Kingsley, Proc. Acad. Nat. Sci. Philad., p. 194, 1880, et synonyma. 
Arrou Islands (a small female). 
The front is transversely wider and less abruptly deflexed ; the postfrontal lobes less 
prominent, and the epistoma is wider and shorter in this species than in Grapsus 
maculatus. 
The Challenger specimen is a small one and faded, presenting but slight traces of the 
original coloration. 
?• 
Lines. 
Millims. 
Length of carapace, .... 
10 
21 
Breadth of carapace, about . 
101 
22-5 
