14. A. hyalina, Turt. (Bulla.)—A. diaphana and Utriculus pellucidus, minutus, and candidus.—Scarborough, Weymouth, Cork, etc. Littoral, Mc. N. Eu. Rather square.
15. A. globosa, Jeffreys, Ann. Nat. Hist. Jan. 1859.—Skye.
Akera.
16. A. bullata, Müller.—Bulla Akera, B. norvegica, B. resiliens, fragilis, flexilis, Hanleyi.—Southampton, Zetland, Galway, etc. Littoral, Mc. N. and S. Eu.
Bulla.
17. B. Cranchii, Leach.—B. punctura and striata.—Brit. co. gen. Devon, Aberdeen, Cork, etc., 50 to 100 fath., Mr. Spirally puncto-striated.
18. B. cornea, Lamk.—B. hydatis (as of Linn.), B. navicula, B. ampulla, Haminea hydatis.—South Brit. co., 0 to 50 fath., C. S. Eu. Broad, thin.
19. B. hydatis, Linn.—Haminea elegans.—Guernsey and Mediterranean. Narrower and more solid than B. cornea.
Philine.
20. P. aperta, Linn.—P. Bulla, Bullæa, and Lobaria a., quadripartita, quadrilobata, and Planciana.—Brit. co. gen., C. S. Eu. Large, smooth.