BULLA. 533 



combe (IJarlee) ; Pembrokeshire (Jeffreys) ; Cork (Hum- 

 phreys) ; Galway (Farran). An exceptional locaHty in 

 the range is Scarborough (Bean). 



It extends to the Mediterranean, where it is a common 

 shell on the verge of water-mark. 



B. Cranchii, Leach. 

 Elliptic, milk-white, spirally striated with impressed dots. 



Plate CXIV. D. fig. 8, 9, and (Animal) Plate V. V. fig. 2. 



Bulla Cranchii, Leach in Fleming's Brit. Animals, p. 292. — Johnston, Berwick. 



Club, vol. ii. p. 30.— Macgilliv. Moll. Aberd. p. 188.— Brit. 



Marine Conch, p. 140, f. 20. — Brown, lllust. Conch. G. B, 



p. 57. — Alder, Cat. Moll. Northiimb. and Durh. p. 27. 



„ pmiclura, Johnston, Edinb. New Philos. Journ. April, 1828, p. 79, teste 



Johnston. 

 „ striata, Brown, Illust. Conch. G. B. p. 57, pi. I 9, f. 41, 42 ? 

 Scaphander Cranchii, Loven, Index Moll. Scand. p. 10 .' 



The shell has an elliptical form, is bluntish and finely 

 perforated above, and narrowed below ; it is neither 

 pellucid, very thin, nor tumid, and is of a glossy milk- 

 white hue, often stained when young by a ferruginous 

 coating, and covered when adult by a very thin oil-yellow 

 skin. Although the entire exterior is densely striated 

 by numerous spiral series of minute impressed dots, they 

 are so faint, small, and isolated upon the middle portion 

 of the younger specimens, as to seem almost obsolete ; 

 the two extremities, especially the anterior one, are like- 

 wise encircled by rather distant narrow sulci. The 

 aperture is curved and somewhat horn-shaped ; it gra- 

 dvially dilates from above as far down as the junction of 

 the pillar to the body, after which it is again slightly 

 contracted by the curve of the outer lip. This last, which 

 is somewhat raised above the crown posteriorly, is mode- 



