13. J. diaphana, Alder, (Rissoa.)—R. glabra.—Dublin, Swansea, Northumberland, etc.; littoral, R.
14. J. opalina, Jeffreys, (Rissoa.)—Channel Isls., R.
15. J. globularis, Jeffreys.—Skye.
16. J. Gulsonæ, Clark, (Odostomia.)—Chemnitzia G.—Sandwith, Lerwick, Weymouth, etc., Guernsey.
Euomphalus.
17. E. nitidissimus, Adams, (Helix.)—Skenea, B. Moll., Truncatella atomus.—Shetland to Channel Isls., Mc.
18. E. rota, Forbes and Hanley, (Skenea.)—Donegal, rare. Like a minute Ammonite.
Skenea.
19. S. planorbis, O. Fabr. (Helix.)—Turbo, Sk. depressa.—Brit. shores generally, on coastal Corallines, C. Flat, like a Planorbis.
20. S. divisa, Flem. (Turbo.)—Helix and Sk. serpuloides, Adeorbis striatus.—Scarborough, Weymouth, Orkney, Galway, etc., 7 to 25 fath., Mr. Striated.