PLATE XV. 



TuRRlTELLA. 

 Fig. 



1. T. cornea, Lamh. — 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, Risso. — T. cornea?, T. Terebra. — Brit. co. gene- 



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



Aporrhais. 



4. A. pes-pelicani, Linn. {Strombus.) — A. quadrifidus, Tritonium, and 

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

 C. Outer lip with one anterior lobe. 



B. A. pes-carbonis, Brongniart. — Rostellaria and A. p., and serres- 

 siana. — Zetland, 70 to 100 fath., R. Outer lip with two an- 

 terior lobes. 



Cecum. 



6. C. trachea, Mont. — Dentalhm and Orthocera imperforatum, C. 



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

 Ringed and striated. 



7. C. glabrum, Mont. — C, Benialium, and Orthocera minutum, and 



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

 Bay. Rare, 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 Chiaje. — C. angustissimum. — Guernsey, R. ; S. 



Eu. Lengthened, white. 



10. C. adversum, Mont. (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. (Murex.) — 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, Eanley.— Exmouth, Rr. Two rows of tubercles. 



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



R. Rather Buccinum-shaped. 



14. C. metula, Loven, (Cerithium.)— C. nitidum, Forbes.— Zetland, 50 



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



