84 MOBERX SYSTEM. 



nbdomai of the male willi the fourth joint elongate: shell with the 

 transverse and longitudinal diameters the same. 

 Sp. 1. For. variegatus. Shell obscurely granulated on each side, with 

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

 teeth; wrists internally with one tootli. Leach, JMalac. Podoph. Brit. 

 I. 1. male and female. Cancer latipes. Pcnn. Brit. Zool. iv.3. t. \.f. l, 

 female. 



rianc 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 sliores. 



When li\ing it is most beautifully mottled, and the legs arc of a 

 luteous-orange colour. 



Genus 4. CARCINUS. Leach. 



Zi^'es narrower than their peduncles: orJiVs 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 tliird: shell with tlie transverse diameter greatest. 



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

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



Cancer IMicnas of authors. Car. Ma:nas. Leach, Malac. Podoph. Brit, 

 tab. 5. 



This most common species inhabits all the shores and estuaries of 

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

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

 by the poor. 



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

 ilyes much thicker than their peduncles; orbits hchmd, with two fis- 

 sures, below with one fissure : abdomen of the male with the I'ourlh 

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

 externally with elevated lines, arms generally unarmed; hinder pair 

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

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

 teeth. 



* Hinder dazes 2t it h an elevated longitudinal line ; external double 

 palpi with the second joint of their inter7ial footstalk truncate at their 

 internal apex. 



a. Orbits at the insertion of the antenna imperfect. Wrists hi- 

 dentate. 



Sp. 1. Por. puber. Antenna- half the length of the body: shell pu- 

 ' bcscent; front with many teeth. 



Cancer puber. Linne. Cancer velutinus. Penn. Brit. Zool. W.Q. pl.i. 

 fg. <3. Portiinus puber. Leach, Mai. Podoph, Brit. tab. 6. 



