318 



DEC A POD A. 



MACROUBA 



PEN 1 /HAD 



Penceus Caramote. Desmar. 



Specific character. Filaments of the internal antennae shorter than the last two 

 articulations. Thorax trisulcate posteriorly ; rostrum bent downwards, above 

 multidentate. 



Alphceus caramote 

 Penceus 



trisulcatus 



Risso, Crust, de Nice, p. 20. 



DESMAR. Consider, surles Crust, p. 225. Risso, Hist. 



Nat. de 1'Eur. Mer. V. p. 57. EDW. Hist, des 



Crust. II. p. 413. 

 LEACH, Mai. Brit. t. xlii. 



THE carapace is large and somewhat ventricose ; the 

 rostrum extending to the peduncle of the internal antennae, 

 armed above with numerous (about twelve) rather strong 

 teeth, and beneath with one or two points only, the latter 

 placed a little in front of the line of the eyes ; on each 

 side of the rostrum is a crest, which is continued back- 

 wards to near the margin of the carapace, thus forming 

 a deep groove on each side of the median crest of the 



