PEDUNCULATA. 169 



rate valves, two of which are on the sides of the aperture, 

 and the others dorsal, 



Cineras aurita The Eared Cineras. Plate XIX. 



fig. 2. Greenish ash-colour, clouded and streaked with 

 black; wrinkled towards the base. Inhabits the coast of 

 England. 



Genus 3 — P0LLICIPE3.— ZeacA. 



Generic Character. — Body covered by a shell, and sup- 

 ported on a tubular, tendinous, scaly peduncle ; with many 

 tentacular arms. Shell compressed at the sides, with nu- 

 merous separated unequal valves, thirteen or more in num- 

 ber ; the lower side ones the smallest. 



PoUicipes cornucopia. — The Cornucopia Pollicipes. 

 Plate XIX. fig. 3. Peduncle short, covered with imbri- 

 cated scales, the base of the scales towards the bottom of 

 the peduncle rounded, and pointing upwards. Inhabits the 

 European seas. 



Genus 4.— SCALPELLUM. -Zeac^. 



Generic Character. — Body covered by a shell, and sup- 

 ported by a tubular, scaly peduncle ; multivalve, but the 

 valves never exceeding thirteen in number, concentrically 

 striated, and frequently with a central pointed inclined 

 knob. 



Scalpellum vulgare — The Common Scalpellum. Plate 

 XIX. fig. 4. Valves rough, the dorsal one compressed ; 

 covered with short hairs ; peduncles short, annulated, and 

 hairy. Inhabits the British seas. 



Genus 5.— AtfATIF A.— Bruguiere. 



Generic Character. — Body covered with a shell, sup- 

 ported by a tubular tendinous peduncle ; with long, numer- 

 ous, and unequal tentacular arms, which are articulated and 

 ciliated, and emanating from the summit on one side. Shell 

 compressed on the sides, with five flat valves, the valves 

 p 



