312 



PENv4<',ADJ!',. 



DEC A POD A. 



MACROURA. 



PENAiA DJE. 



PasipJiaca Sivado, Risso. 



Specific cliuructer.— External caudal laminae longer than the internal, which 

 are lunger than the middle one. 



? Aljjheus Sivado, Risso. Crust, de Nice, t. iii. f. 4. p. 93.— Desmar. Con- 

 sid. sur les Crust, p. 240. — Latr. Regn. Anim. de Cur. 

 IV. p. 99. 

 ? Pudphcea „ Risso, Hist. Nat. de I'Eur. Merid. V. p. 81. — Edvv. 



Hist. Nat. des Crust. IV. p. 426. — Guek. Iconog. du 

 Reg. Anim. (Crust.) t. xxii. f. 3. — Thompson, Ann. 

 Nat. Hist. V. p. 23(5. 

 „ Saviynii, Leach, MSS. in Mus. Brit. — Edw. 1. c. p. 426. 

 „ brcviroslns, Edw. 1. c. p. 426. 



The general form of this remarkable species distinguishes 

 it at first sight from every other known Crustacean. The 

 whole body is exceedingly compressed laterally, and the 

 carapace elongated and somewhat attenuated forwards. 

 There is scarcely a perceptible rostrum ; but immediately 

 behind the anterior margin of the carapace, is a small 

 triangular tooth, with the point turned forwards, and a 

 similar one, but smaller, on each side just above the origin 



