26 ORDER II. PEDUNCULATE. 



Lamarck with Pollicipes, is generally adopted by modem naturalists. Its 

 shell consists of thirteen unequal pieces, twelve of which are lateral and 

 very much flattened or compressed, and one dorsal, elongated and acu- 

 minated at the apex. They are all united together on the integument or 

 cartilaginous membrane, and the peduncle upon which the shell is sup- 

 ported is covered with small scales. The genus Smilium of Leach and 

 Gray may possibly be distinct ; but as the shell appears to differ only in 

 the arrangement of the pieces, and the peduncle in being covered with 

 hair instead of scales, we have not ventured to adopt it. 



Example. 



PL XIII. Fig. 1 , 2. 



Scalpellum vulgare, Leach, Enc. Brit. Supp., vol. iii. p. 170. pi. 57. f. I. 

 Lepas scalpellum, Linnaeus. 

 Anatifa scalpellum, Bruguiere. 

 Pollicipes scalpellum, Lamarck. 

 Poh/lepas vulgaris, De Blainville. 



POLLICIPES, Hill. 



Testa multivalvis, lateraliter subcompressa ; valvis quinque superioribus 

 majoribus, cseteris inferioribus minimis, omnibus superne acutis ; 

 pedunculo squamulifero. 



The genera Pollicipes of Hill and Capitulum of Klein have been united 

 under the former title by Leach, Lamarck, Sowerby, and other modern 

 naturalists ; they are both, however, retained by Gray, who has also formed 

 a new genus, Calantica, of the P. tomenlosus and hispidus of Leach. 



The shell of Pollicipes consists of five principal elongated trapeziform 

 pieces, surrounded with a number of smaller ones similarly shaped ; 

 they are all sharp-pointed at the apex, and form together an irregular 

 laterally-compressed cone, which is supported on a thick, scaly, coria- 



