458 THE ZOOLOGIST. 
joints hairy, with longer cilia on the edges; the third joint 
distinctly denticulated along the upper margin, with a hairy 
patch beneath. The carapace is of a light flesh-brown colour, 
and the formation of it in some respects resembles X. florida and 
in others X. rivulosa. 
Mr. R. Q. Couch, who discovered this species, says that it 
prefers deeper water than the two former species, but that in 
summer it approaches the shore, and is then found under stones. 
It spawns in June. 
We have no wish to question the existence of a species with 
which we are so little acquainted, but its description so nearly 
corresponds to the young of X. florida, which species differs very 
much at various stages of growth, that it almost seems as if the 
discovery of one or two specimens in an isolated spot might be 
reasonably attributed rather to a variation owing to local cir- 
cumstances than to the existence of a new and distinct species, 
particularly as it so closely resembles both the last-named. 
Cancer pagurus, Linn. 
This is the “crab” of commerce, and to most people 
the only crab. It enjoys the position of being an object of 
legislation, and the cause of a large and wide-spread fishing 
industry. 
Cancer pagurus is the sole representative, in our seas, of 
the genus, though many others exist. The carapace is, roughly 
speaking, oval, somewhat convex, and having the usual indentation 
put slightly shown. The anterior margin is regularly notched or 
rather “crimped.” .The orbits are circular, and the eyes are 
capable of being deflected for protection beneath a toothed 
edge; the antenne are comparatively small, with the basal joint 
elongated. The anterior pair of legs are massive and broad, the 
ambulatory Icgs hairy, the pincers black and armed with powerful 
rounded tooth-like projections. The segments of the male are 
narrow, those of the female broad; they are armed with tufts of 
stiff hair. The colour of this species is a brick-red or reddish 
brown, and it does not undergo such a striking change of colour 
in boiling as do most of the other Crustacea. The tints of young 
specimens vary considerably, some that we have met with being 
of a pale yellow, whilst others were, as Bell also mentions, of a 
purplish hue. 
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