fig. 



15. T. Montagut, Gray.—T. striatus, Forbes.— Scarborough, Exmouth, 



Cape Clear, etc., C. Elevated, whorls tumid. 



16. T. tumidus, Mont. — T. patholatus, Rackettii, etc. Brit. co. gene* 



rally, C. Short, whorls tumid, umbilicated. 



17. T. cineeeus, Linn. — T. lineatus, T. perforatus, etc. — Brit. co. 



generally, C. Littoral, small umbilicus. 



18. T. UMBILICATUS, Mont. — T. cinerarius, etc. — Guernsey, S. and W. 



Brit, co., C. Littoral, umbilicus large. 



19. T. majus, Linn. — T. tuber culatus. — Brit. co. generally; littoral, C. 



Broad, tuberculated. Large umbilicus. 



20. T. lineatus, Costa. — T. crass?is, etc. — Channel Isls., Devon. W. 



Ire., Mc. Smooth, imperforate. 



Margarita, or Trochus. 



21. M. TJNDULATUs, Sowerby. — Turbo carneus, M. striata, etc. — Scot- 



land, 5 to 50 fath., Mc. Striated and undulated. 



22. M. helicinus, Fabricius. — Turbo and Trochus neritoideus, margarita, 



M. vulgaris, etc. — Many Brit. loc. ; littoral, C. 



23. M. pusilltjs, Jeffreys. — Lerwick, E., 10 to 40 fath. Minute, 



white, depressed. 



24. M. exilis, Phil. — Skenea Cutleriana. — Guernsey, Skye, etc., R. 



Globose, striated. 



Adeorbis. 



25. A. subcarinata, Mont. — {Helix) Trochus rugosus, Cingula subc, 



etc. — S. Brit, co., Mr. Depressed, keeled. 



Scissurella. 



26. S. crispata, Mem.— Zetland, etc., in sand, Mc. 



Phasianella. 



27. P. pttllus, Linn. [Turbo.) — T. pictus, Cingula p., etc. — Brit. co« 



generally, C. 



