PLATE XV. 



TORRITELLA. 

 Kig. 



1. T. CORNEA, Lamk. — T. communis, var., B. M. — Cork and Zetland, 



Mr. Whorls less flat and less rapidly enlarged than T. communis. 

 A white var. exists {T. nivea). 



2, 3. T. COMMUNIS, lUsso.—T. cornea ?, T. Terebra. — Brit. co. gene- 



rally; 4 to 100 fath., Cc. Aperture rather square. 



Aporrhais. 



4. A. PE3-PELICANI, Linn. [Strombus.) — A. quadrifidm, Tritonium, and 



Rostellaria p.— Bni. co. gen. ; N. and S. Eu. ; 4, to 100 fath., 

 C. Outer hp with one anterior lobe. 



5. A. PES-CARBONis, Brongniart. — Rostellaria and A. p., and scrres- 



«m««.— Zetland, 70 to 100 fath., E. Outer lip with two an- 

 terior lobes. 



C^CUM. 



6. C. TRACHEA, Mont. — Bentalium and Orthocera imperforatmn, C. 



anuulatus.- — Devon, Weymouth, Scotland, Cork, etc., R. ; S. Eu. 

 Einged and striated. 



7. C. GLABRUM, Mont. — C, Bentalium, and Orthocera niinutum, and 



lavissimum. — Exmouth, Weymouth, Swansea, Lerwick, Bantry 

 Bay. Eare, smooth. 



Cerithium. 



8. C. RETicuLATUM, Costa, [Strombiformis.) — Murex and Terebra r. 



—Brit. CO. gen., to 20 f., C. Narrow, and closely reticulated. 



9. C. METAXA, Belle Ckiaje. — C. angustissimum. — Guernsey, E. ; S. 



Eu. Lengthened, white. 



10. C. ADVERSUM, ifoMi!. {Murex.)—C., Triphoris, Turbo, and Terebra a., 



perversus, and reticulatus. — W. and S. Brit., Channel Isls., etc., 

 5 to 25 fath., Mr. 



Cerithiopsis. 



11. C. TUBERCULARE, Mont. {Murcx.) — Cerithium and Terebra t.— 



Brit. CO. gen. ; S. Eu. ; 4 to 40 fath., Mc. Three rows of tu- 

 bercles in the penultimate whorl. 



12. C. Clarkii, Hanlei/.—^-xmowih, Er. Two rows of tubercles. 



13. C. NIVEA, Jeffreys, Ann. Nat. Hist. 1859.— In shell sand, Belfast, 



E. Eather Buccinum-shaped. 



14. C. METULA, Loven, {Cerithium.)— C. nitidum, Forbes.— Zetland, 50 



to 80 fath., E. White, with angular whorls. 



