PEDUNCULATA. 149 



membranous tunic, which is swollen above, with an opening be- 

 low the summit, from which protrude many ciliated, articulated 

 arms. — Shell having five testaceous, oblong, separate valves, tvvo 

 of which are on the side of the gap, and the other dorsal. 



Cineras auraius. — The Eared Cineras. Plate XIX. fig. 

 2. Greenish ash-colour_, clouded and streaked with black ; wrin- 

 kled towards the base. Inhabits the coast of England, 



Genw.^ 3.— POLLICIPES.— Ze«c7z. 



Generic Character. — Body covered by a shell, and supported 

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

 arms. — Shell compressed at the sides, with numerous separated 

 valves, unequal in number, thirteen or more ; the lower side ones 

 the smallest. 



Pollicipes cornucopia. — The Cornucopia Pollicipes. Plate 

 XIX. fig. 3. Peduncle covered with imbricated scales, the base 

 of the scales towards the bottom of the peduncle, rounded, and 

 pointing upwards. Inhabits the European seas. 



Genus 4 — SCALPELLUM.— ZeacA. 



Generic Character. — Body covered by a shell, and supported 

 by a tubular, scaly peduncle ,- multivalve, but valves never ex- 

 ceeding thirteen in number, which are 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; cov 

 ered with short hairs ; peduncles short, annulated, and hairy. 

 Inhabits the British seas. 



Genus 5,—A.'^ATlFX.—Bruguiere. 



Generic Character. — Body covered with a shell, supported by 

 a tubular tendinous peduncle ; with long, numerous, and unequal 

 tentacular arms, which are articulated and ciliated, and emanat- 

 ing from the summit on one side. — Shell compressed on the 

 sides, with five flat valves, the valves contiguous and unequal ; 

 the lower lateral ones the largest ; the whole of them united and 

 kept together by means of thin membranes. 

 n3 



