2. 
vulgata. 
Descriptive Catalogue of the British Testacea. 299 
Born Mus. p. 414. vign. fie. 000 | 
-Donovan Brit. Shells, t. 199. P. albida; 
Montagu Test. Brit. p. 489. 
Habitat in mari, ostreis adherens. 
Testa alba, pellucida, levis, integerrima, latior quam longa. Interne. lå- 
bium adglutinatum longitudinaliter, sed oblique, membranaceum, ver- 
sus latus flexum, dehiscens a testa. (Mus. Lud. Ulr. p. 688.) 
First noticed. as British by Col. George, at Penryn, 
Cornwall, where it has been also found xem Mr. Mon- 
tagu and ae Ayers 
P, testa AREE gs 14 absolut. margine di- 
latato acuto. Linn. Fauna Suecica, n. 2199. Syst. 
Nat. n. 758. p. 1258. Linn, Gmel. p. . 9697. 
Lister Anim. Angl. t. 5. f. 40. —— Conch. t. 535. f. 14. 
d Gualt. Test. t. 8. f. E 
—- Ginann. Adriat. t. 2. f. 17. 
Borlase Corno. t. 98. f. 3. 
Martini Conch. 1. t. 5. f. 38. 
-Knorr Vergn. 6. t. 27. f. 8. 
Pennant Brit. Zool. t. 89. f. 145. $ T 146. P depressa. 
Da Costa Brit. Conch. p. 3. t. 1. f. 1,2, 8. 
Pulteney in Hutch. Dorset. p. 51. t. 23. » n 2, 8. 
Donovan Brit. Shells, t. 14. —— 
Montagu Test. Brit. p. ATES 
Habitat in mari, rupibus et saxis adheerens, frequentissima, 
Testa interdum 22 poll. longa, 2 lata, 14 a vertice ad basin, nunc co- 
- mica, nunc depressa, sordide viridescens, vel fasciis fuscis variegata, 
subtus colore testudinis vel flavescente; angulis plurimis elevatis tu- 
berculatisque costata. Apex obtusiusculus est, et margini angustiorh 
propior, nec in centro. Margo nunc indentatus, nunc integerrimus. 
The conic and depressed shells of this species, though 
at 
