
MR. T. BELL ON THE GENUS CANCER. 341 
the antepenultimate and terminal joints longitudinally furrowed; the nail small and 
slender. 
The colour of this pretty species is a light lively red above, with several curved lines 
of white spots over the’branchial and hepatic regions, a white lengthened spot on each 
side of the genital region, and a white mark, like a V, over the intestinal. The anterior 
feet are of a darkish red above, the remaining legs dotted with purplish red. The under 
side is whitish. 
The carapax of the female is less broad in proportion than that of the male, and as 
usual more elevated ; but I do not observe, in the numerous specimens in my posses- 
sion, that considerable difference which Say describes as being sufficient to occasion 
some hesitation whether they belong to the same species. The spots on the carapax 
are indeed much less distinct in the female, but they are sufficiently obvious in every 
specimen which I have seen of that sex. 
Length 2+ inches, breadth 4. 
5. Cancer Pacurus, Auct. 
Leach, Mal. Pod. Brit., Tab. X. 
Canc. testé granulatd ; margine antico-laterali decem-lobato, lobis quadratis, contiguis, inte- 
gris ; manibus levibus. 
Hab. ad oras Magne Britannie et Europe Occidentalis. 
Carapax transversely oblong, flattened, but little higher in the middle than at the 
sides, somewhat rounded before and behind ; the surface minutely granulated, smooth, 
with the regions but slightly marked. Latero-anterior margin slightly recurved, di- 
vided into ten quadrate lobes, the sides of which are contiguous, and the margins 
entire ; the last lobe inconspicuous, and passing into the posterior marginal line, which 
terminates immediately anterior to the posterior transverse ridge. Front trifid, the 
teeth of nearly equal length and size. Orbits round, with a strong triangular tooth 
over the inner canthus, which does not project so far as the front ; and a smaller one 
filling the space between the two superior fissures. External antenne with the basilar 
joint much elongated, and terminating forwards in an obtuse tooth; the first joint of 
the moveable portion club-shaped, the second cylindrical, the remaining portion seta- 
ceous. Internal antenne directed forwards, the anterior half doubled directly back- 
wards in a state of rest. The basilar joint broad, cup-shaped, its outer edge project- 
ing forwards; the second joint (the first of the moveable portion) cylindrical, the 
penultimate with a small, hooked, and recurved process at the apex. Pedipalps as in 
the rest of the genus. Sternum minutely punctated, and furnished with small patches 
or lines of short scanty hair. Abdomen in the male with the margin fringed with short 
hair ; the last joint forming an equilateral triangle. Anterior feet large, robust, smooth, 
without spines or tubercles, minutely granulated, the hand rounded, without crest, the 
VOL. I. 22 
