84 MODEIiN SYSTEM. 



abdomen of the male with the fourtli joint elongate: shell with the 

 transverse and longitudinal diameters the same. 

 Sp. 1. Por. rat-iegatus. Shell obscurely granulated on each side, with 

 five teeth, the sf cond and third somewhat obsolete ; front with three 

 teeth; wrists internally with one tooth. Leach, Malac. Fodoph. By-it. 

 t. -1. male and female. Cancer latipes. Pean. Brit. Zool. iv.3. t. l.f. 4. 

 female. 



Plane first discovered this species on the shores of the Adriatic 

 sea. It burrows beneath the sand, where it may be found by dig- 

 ging at low water, on most of our sandy shores. 



When living it is most beautifully mottled, and the legs are of a 

 luteous-orange colour. 



Genus 4. CARCINUS. Leach. 



J)j/es narrower than their peduncles: oriiVs behind and beneath with 

 one fissure : anterior pair of legs unequal, the hands externally 

 smooth; hinder pair compressed, and slightly formed for swimming: 

 abdomen of the male with the fourth joint transverse, and scarcely- 

 narrower than the third; shell with the transverse diameter greatest. 



Sp. 1. Car. MiEnas. Shell with five teeth on each side; front with three 

 rounded teeth or lobes : hands with one tooth, wrist with a spine. 



Cancer Mtenas of authors. Car. Msnas. Leach, Malac. Fodoph. Brit, 

 tab. o. 



This most common species inhabits all the shores and estuaries of 

 Britain. It burrows under the sand, or conceals itself beneath fuci 

 Hud stones. It is sent to London in immense quantities, and is eaten 

 by the poor. 



Genus 5. PORTUNUS. Fabr., Latr., Bosc, Lam., Leach. 



Eijes much, thicker than their peduncles ; o/'6/Ys behind, with two fis- 

 sures, below with one fissure : abdomen of the male with the fourth 

 joint transverse: anterior pair of legs somewhat unequal, the hands 

 externally with elevated lines, arms generally unarmed; hinder pair 

 compressed, foliaceous, and formed for swimming : shell with the 

 transverse diameter greatest; the sides with five, rarely with six, 

 teeth. 



* Hinder claws with an elevated longitudinal line ; e.rternal double 

 palpi rcith the second joint of' their interjiul footstalk truncate at their 

 internal apex. 



z. Orbits at the insertion of the antenna: imperfect. Wrists bi- 

 dentate. 



Sp. 1. Por. puher. Anteimaj half the length of the body: shell pu- 

 bescent; front with many teeth. 



Cancer puber. Linne. Cancer velutinus. Pcnn. Brit. Zool. iv. 8. pi. 4. 

 fg. 8. Portunus puber. Leach, Mai. Fodoph. Brit. tub. 6. 



