CLASS I. CRrSTACrA. 85 



Inhabits the southern coasts of Devon. In France it is used as an ar- 

 ticle of food. 



b. Orbit internally slightly imperfect. Wrists unidentate. 

 Sp. 2. For. corrugatus. Shell convex, with transverse serrate-granulate 

 ciliated lines, the side with five teeth on each side, the three hinder 

 of which are more acute; front trilobate, the lobes subgranulate-ser- 

 rate, the middle one largest; hands above, unidentate; hinder claws 

 with sharp points. 



'uncer corrugatus. Fcnn. Brit. Zool. iv. pi. 5. fig. 9. Portunus corru- 

 iZatois. Leach, Trans. Linn. Soc. xi. 31"). — 2Iat. Fodoph. Brit. tab. 7. 

 jig. 1 4- 2. 

 'iiiutbits the British seas. 



** Hinder claws zcithout the derated line. External double palpi 

 with the internal apex of the second joint of the internal footstalk enutr- 

 ginate. Orbits internally beneath the insertion of the antenna' imperfect. 

 Sp. 3. For. marmorcus. Shell convex, obsoletely and slightly granu- 

 lated, with five nearly equal teeth on each side; front witli three 

 equal teeth, with rounded points; hands smooth, with one tooth 

 above; hinder tarsi with acute points. 

 Cancer (pinnatus) marmoreus. Montagu's MSS. Portunus marmoreus. 

 Leach, Malacost. Fodoph. Brit. tab. 8. 



This elegant specie'-, 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 fisher- 

 men, or thrown on the shore after storms. 



Fam. III. Cancertd.t,. lueach's MSS. 

 Antennae simple, short: four hinder pair of legs simple. 



Genus G. CANCER of authors. 



External antenniz short, inserted between the internal cantliuS of the 

 eye and the front; internal antennas placed in foveols 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 emarginatc behind ; orbits behind with one fis- 

 sure, and externally with one fold : beneath with one* fissure, and 

 externally with one fold : anterior pair cflegs unequal. 



Sp. 1. Can. Fagurus. Shell granulated with nine folds on each side; 

 front with three lobes. 



This species is the common crab of Britain. It is considered to 

 be 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 

 rocky coasts, especially where the water is deep. At low tide they 

 are often found in holes of rocks in pairs, male and female; and if 



