238 ARCADE. 



(M'Andrew and E. F.); Fishguard, in twenty fathoms 

 (JeftVeys); and off Lundy Island, in twenty-seven fathoms 

 (M'Andrew); Isle of Man, in twenty-five fathoms (E.F.) ; 

 frequent in cavities of stones and shells from deep water, 

 north of Northumberland (Embleton) ; rare at Scarborough 

 (Bean) ; Berwick (Johnston) ; thirty-five fathoms, Buchan- 

 ness, and Staples ; seventeen fathoms, Eda Sound, Orkney 

 (Thomas); twelve fathoms, Orkney; Zetland, in twenty- 

 five and fifty fathoms, and off Cape Wrath, in fifty-five 

 fathoms (M'Andrew and E. F.). 



A. LACTEA, Linnaeus. 



White ; umbonal ridge blunt ; teeth numerous. 



Plate XL VI. fig. 1, 2, 3. 



Lister, Hlstor. Conch, pi. 235, f. 69. 



Area Iciciea, Linn. Syst. Nat. ed. 12, p. 114L — Da Costa, Brit. Conch, p. 171, 



pi. 11, f, 5.— DoNov. Brit. Shells., vol. iv. pi. 135.— Mont. Test. 



Brit. p. 138. — Maton and Rack. Trans. Linn. Soc. vol. viii. p. 



93. — Dorset Catalog, p. 36, pi. 11, f. 5. — Fleming, Brit. Anim. 



p. 398.— Brit, Marine Conch, p. 102.— Brown, 111. Conch. G. B. 



p. 86, pi. 33, f. 6. — Dillwyn, Eecent Shells, vol. i. p. 236. — 



Lam. Anim. s. Vert. (ed. Desh.) vol. vi. p. 467. — Maave, Linn. 



Syst. Conch, pi. 13, f. 4.— Costa, Cat. Test. Sicilia;, p. 46.— 



Philippi, Moll. Sicil. vol. i. p. 57, and vol. ii. p. 42. — Hanl. 



Recent Shells, vol. i. p. 154, pi. 9, Area, f. 24. — Reeve, Conch. 



Iconica, Area, pi. 17, f. 116. 



„ harhata. Pennant (not Linn.), Brit. Zool. ed. 4, vol. iv. p. 98, pi. 58, f. 59. 



„ modiolus, PoLi, Test. Sicilise, vol. ii. p. 137, pi. 25, f. 20, 21. — Costa, 



Cat. Test. Sicilise, p. 45. 

 „ crinita, Pultenev, Hutchins, Hist. Dorset, p. 35. 



„ per/oratis, Tukt. Conch. Diction, p. 9 ; Dithyra Brit. p. 169, pi. 13, f. 2, 3. 

 „ Gaimardl, Payraudeau, Cat. Moll. Corse, p. 61, pi. 1, f. 36 to 39. — 

 Desh. in Lam. Anim. s. Vert. (ed. Desh.) vol. vi. p. 476. — 

 Costa, Cat. Test. Sicilise, p. 46. — Hanl. Recent Shells, 

 vol. i. p. 155. — Desh. Exp. Sc. Algiers, MoUus. pi. 124, f. 8 

 to 11. 

 „ Qmiji, Payraudeau, Cat. Moll, Corse, p. 62, pi. 1, f. 40 to 43. 



