CRUSTACEA. DECAPODA. 



middle one largest. Inhabits coasts of Britain. Of small size. 

 Lin. Trans, ix. pi. 2, fig. 2. 



Gen. 14. ATELECYCLUS, Leach. Cancer, Mont. 



Exterior antennae half the length of the body ; the third joint 

 cylindrical and elongated ; exterior feet-jaws with the se- 

 cond joint of the internal foot-stalk shortest, and notched 

 within ; anterior legs of the male longer than the body, with 

 a compressed hand ; the other legs with tibiae and tarsi of 

 equal length, and elongate quadrate claws ; shell subcircu- 

 lar before, converging into an angle behind. 



A. sepiemdentatvs, Leach. Shell granulated ; the sides with seven 

 serrated teeth, and other smaller ones ; front with three teeth. 

 Inhabits coasts of England Lin. Trans, xi. pi. 1. 



Gen. 15. PODOPHTHALMUS, Lam. Portunus, Fab. 

 Exterior antennae short; third joint of the exterior feet-jaws 

 square, short, and strongly notched at its internal angle ; first 

 pair of feet very large, equal, with forceps ; the posterior pair 

 terminated in an oval ciliated plate ; eyes on long peduncles, 

 approximated at their base, and lodging in a groove ; shell 

 short, transverse, depressed, with two spines on each side. 



P. spinosus, Lam. With two spines on each side, the first largest ; 

 forceps very large ; arms with five spines ; colour reddish. In- 

 habits Indian ^eas Lot. Gen. pi. 1 and 2, fig. 1. 



Gen. 16. LUPA, Leach. Portunus, Fab. 

 Eyes much thicker than their peduncles ; orbit above with two 

 fissures, beneath with one ; anterior pair of legs equal ; the 

 arms spinous anteriorly ; hinder pair much compressed ; shell 

 transverse, with nine teeth on each side, the last longest. 



L. forceps, Leach. Shell granulated ; wrists with a spine on each 

 side ; toes very long, filiform, slightly bending upwards, and den- 

 ticulated within ; hinder claw much compressed, round, ovate. 

 Inhabits West Indies Zool. Mis. i. pi. 54. 



Gen. 17. PORTUNUS, Fab. Lat. Cancer, Lin. 

 Exterior antennae short or medium size, terminated by a seta- 

 ceous filament, longer than the peduncle; eyes distant, on short 

 peduncles, inserted in lateral furrows under the front ; shell 

 broad, depressed, slightly rounded before and serrated ; the 

 anterior pair of legs with forceps, the posterior pair terminat- 

 ed by an oval and ciliated plate. 



P. puber, Fab. Shell pubescent, denticulated in front, with five 

 teeth directed forwards on each side of the anterior margin ; for- 

 ceps granulated ; wrists tridentate ; antennae half the length of 

 the body ; colour brown, and about 2^ inches long. Inhabits 



rocky coasts of Europe. B Desm. Crust. 93. 



This species is used in France as an article of food. 



