APORRHAIS. 189 



— Mont. Test. Brit. vol. i. p. 253. — Maton and Rack. 

 Trans. Linn. Soc. vol. viii. p. 141. — Rack. Dorset 

 Catal. p. 46, pi. 15, f. 7. — Turt. Concli. Diction, p. 165, 

 f. 50, 51. — Born, Test. Mus. Caes. p. 270, and vign. at 

 p. 269. — Olivi, Zool. Adriat. p. 148. — Dillw. Recent 



Shells, vol. i. p. 656.— Wood, Index Testae, pi. 24, f. 4. 



— Costa, Test. Sicil. p. 82 (animal). 

 Pes-pelecani, Martini, Conch. Cab. vol. iii. p. 142, pi. 75, f. 848, 849. 

 AporrJiais quadrijidus , Da Costa, Brit. Conch, p. 1 36, pi. 7, f. 7. 

 Tritoniiun pes-pekcani, Muli.er, Zool. Danic. pi. 87. f. 1, 2. 

 liostellaria „. Lamarck, Anim. s. Vert. (ed. Desh.) vol. ix. p. 656. — 



Fleming, Brit. Anim. p. 359 Macgill. Moll. Aberd. 



p. 173. — Brit. Marine Conch, p. 211. — Brown, Illiist. 



Conch. G. B. p. 5, pi. 5, f. 21, 39. — Crouch, Introd. 



Lam. Conch, pi. 18, f. 3. — Sowerby, Genera Sh. Rost. 



f. 3.— Blainv. Fauna Franq. Moll. p. 202, pi. 8, f. 1.— 



Desh. Encj-cl. Meth. vol. iii. p. 909. — Joannis, Mag. 



de Zool. ser. 1, Moll. pi. 41, animal Sowerby, 



Manual Conch, f. 404. — Kiener, Coq. Viv. Rest. pi. 4, 



f. 1, 1 a. — Reeve, Conch. Sj-stem. pi. 246, f. 5. — 



CuviEB, Regne Anim. (ed. Croch.) pi. 61, bis, f. 3. 

 Clienopus ,. Philippi, Moll. Sicil. vol. i. p. 215; vol. ii. p. 185. — 



Johnston, Berwick. Club, vol. i. p. 232. 

 Aporrhais „ Swainson, Malacology, p. 309, f. 76, a; and p. 142, f. 15, 



a (young). — Sowerby, Thesaur. Conch, vol. i. p. 21, 



pi. 5, f. 3, 4. 

 Delle Chiaje, Poli, Test. Sicil. vol. iii. pt. 2, pi. 48, f. 7 to 10 (animal). 



There is so much general similarity between this and the 

 preceding species, that, to economize space, we shall merely 

 indicate the more striking points of diftierence, and add 

 only a few further remarks on the species. 



It is a much more solid shell, and in our native exam- 

 ples a much larger one, measuring commonly two inches 

 in length, and an inch and a third in breadth. The digi- 

 tations are short and broad (the fourth seems, at most, 

 rudimentary) and are occasionally disposed to become pal- 

 mated ; the apex of the upper one does not nearly approach 

 the level of that of the spire, and its base more frequently 

 covers two than three of the volutions of the latter. The 

 broad and stunted tail leans ventrally or downwards. The 



