TAB. VI. 



Fig. 



1. Pleurotoma turricula, page 53. 



a. back view. 



b. front view of another specimen. 



2. Pleurotoma carinata, p. 54. 



a. back view of a specimen from 



the Red Crag. 



b. front view of a specimen from 



the Coralline Crag. 



3. Pleurotoma semicolon (?),p. 54. 



a. front view of var. a. 



b. front view of var. /3. 



4. Pleurotoma intorta, p. 53. 



a. back view of a worn specimen. 



b. front view of another specimen. 



5. Trophon muricatum, p. 50. 



6. Trophon paululum (enlarged),//. 51. 



7. Trophon scalariforme, p. 48. 



a. back view of var. a. 



b. front view. 



c. back view of var. /3. 



Fig. 



8. Trophon alveolatum, p. 49. 



a. back view. 



b. front view. 



9. Trophon costiferum, p. 48. 



a. front view, var. a. 



b. back view, var. /S. 



10. Trophon gracile, /;. 46. 



a. back view, var. a. 



b. front view of var. |3. 



c. front view of another specimen. 



11. Trophon consociale, /?. 49. 



a. front view. 



b. back view. 



12. Trophon imperspicuum, p. 50. 



13. Trophon altum, p. 47. 



«. back view. 

 b. front view. 



14. Trophon gracilius (enlarged), /j. 51. 



