OX.A.SS I. CRUSTACEA. 
85 
Inhabits the southern coasts of Devon. In France it is used as an ai 
tide of food. 
b. Orbit internal! // slightly imperfect. Wrists unutentate. 
S P- 2. Par. corrugatus, Shell convex, with transverse serrate-granulate 
ciliated line the side with live tooth on each side, the three hinder 
of which are more acute; front trilobate, the lobes subgranulate-ser- 
r ate,the middle one largest; hands above, unidentate; hinder claws 
with sharp points. 
Cancer corrugatus. Penn. Brit. Zool. iv. pi. 5. fig. 0. l’ortunus corru- 
gatus. Leach, Trans. Linn. Soc. xi. 315,— Mai. Podoph. Brit. tab. 7. 
% 1 4- 2. 
ln habits the British seas. . . 
*•••• Hinder clam without the elevated line. External double, put pi 
With the internal apex of the second joint of the internal footstalk emar- 
„ g mate. Orbits internally beneath the insertion of the antenneevnperfect. 
S P- 3. Par marmorem. Shell convex, obsoletcly and slightly granu- 
■ated, with five nearly equal teeth on each side; front with three 
equal teeth, with rounded points; hands smooth, with one tootn 
above; hinder tarsi with acute points. 
Cancer {pinnatus) niannoreus. Montagu's MSS. Portunus marmoreus. 
Leach, Malacost. Podoph. Brit. tub. 8. 
This elegant species, which derives its name from its colour, was 
discovered by G. Montagu, esq. It is very common on the sandy 
shores of southern Devon, from Torcross to the mouth of the river 
Ex, and is frequently found entangled in the shore-nets of the hsher- 
nien, or thrown on the shore after storms. 
Fam. III. Cakct.hid/f. Leach's MSS. 
Antenna simple, short : four hinder pair oj legs simple. 
^ Genus 6. CANCER of authors, 
sternal antenna short, inserted between the internal canthus ot the 
c >e and the front; internal antenna placed in foveolce in the middle 
of the clypeus, with their peduncle nearly lunate: external double 
Palpi with the second joint of the internal footstalk notched ' at the 
internal apex: shell emarginate behind; orbits ‘behind with one fas- 
Mj re, and externally with onefold: beneath with one fissure, and 
externally With one fold : anterior pair of legs unequal. . 
1. Can. Pagans. Shell granulated with nine folds on each side; 
front with three lobes. . ., , 
This species is the common crab of Britain. It is considered to 
! ;e in season between Christmas and Easter, and about harvest, being 
much esteemed as an article of food. Its natural history is but little 
known. During the summer months it is very abundant on all our 
rrj cky coasts, especially where the water is deep. At low tide they 
c - re often found in holes of rocks in pairs, male and lemale ; and il 
