36 STALK- AND SESSILE-EYED CRUSTACEA 
Carapace very much flattened, more or less transversely lineolate, 
with the sides arcuate, the front less than half the breadth of the body. 
External maxillipeds having between them, when closed, a lozenge- 
shaped vacant space. Ambulatory legs with the tarsi spmulous below. 
36. Grapsus pictus. 
Grapsus pictus, Latr. Hist. Nat. Crust. vi, p. 69, (1803); Encycel. 
pl. ev, fig. 8, (1818); M. Edw. Hist. Nat.)Crust. u, p. 86, (1837). 
Carapace scarcely convex, granulated anteriorly, with transverse 
lines upon the branchial and hepatic regions. Front nearly vertically 
deflexed. Antero-lateral margins very slightly arcuate, with a tooth 
on each side, behind the external orbital angle. Anterior legs very 
small, Arm with several spines on its inferior, inner, and outer margins, 
towards the distal extremities, wrist granulated above, with a large 
Jaminated acute spine on its inner margin, hand slightly granulated, 
and with two longitudinal ridges on the outer surface. There is a 
small laminated spine behind the base of the mobile finger. Fingers 
eranulated above, excavated at the tips. Third joint of the ambula- 
tory legs, (the last pair excepted), dentate at the distal extremity. 
New Zealand (Coll. Brit. Mus.). 
This species is distributed throughout most of the warmer, temperate 
and tropical seas of the world. Specimens are in the Museum from 
the Cape de Verd Islands, St. Helena, South Africa, the Mauritius, 
California, Peru, Georgia. 
It varies considerably in colour, but I cannot connect this variation 
with the geographical distribution of the species. Several supposed 
species have been described by Milne Edwards and other authors, 
chiefly based upon differences of colour, 
87. Grapsus variegatus. 
Cancer variegatus, Fabr. Ent. Syst. p. 450, (1793). 
Grapsus variegatus, Latr. Hist. Nat. Crust. vi, p. 71, (1808); M. 
Edw. Hist. Nat. Crust. i, p. 87, (1837). 
Grapsus personatus, Lam. Hist. Ann. sans Vert. v, p. 249, (1818). 
Grapsus strigilatus, White, Zool. Miscell. p. 78, (1842); Dieffenb 
New Zealand u, p. 265, (1848). 
Leptograpsus variegatus, M. Kdw. Ann. Sci. Nat. xx, p. 171, (1853). 
Carapace flat, with the branchial regions marked with oblique 
transverse lines. Lateral margins armed with three teeth. Fron 
