PLATE TIL 



Fig. 



la, b. Spirifer rostratus, Sc/il., from the Lower Lias, near Cheltenham. Collection, 



Buchman. This is only a variety of Spirifer 

 rostratus, described by V. Buch. and Zieten, 

 under the name of Sj). verrucosus. 



[ c . „ „ enlarged fragment. 



2. Spirifer Walcottii, Sow., the largest specimen with which I am acquainted, 



from the Lower Lias of Camerton, near Bath. 

 Collection, Moore. 



3. „ „ a specimen from Radstock. 



4. Spirifer Munsterii, Dav., the largest specimen yet found in the marlstone 



of Ilminster. Collection, Moore. 

 4a. „ ,, interior of larger valve magnified. 



4#. „ ,, interior of smaller valve. 



5. 0. „ „ two specimens from the same locality, illustrating 



the common size. 



7. Spirifer Ilminsteriensis, Dav., natural size, from a specimen found by 



Mr. Moore in the Leptana bed of 

 Ilmininster. 

 7a. „ „ enlarged illustration. 



8. Terebratula quadrifida, Lamarck, from the marlstone of Ilminster. Col- 



lection, Moore. 



9. ,, ,, Collection of Mr. Moore. 



10. „ „ deformed specimen. 



11. Terebratula cornuta, Sow., marlstone, Ilminster. 



12. „ „ Collection of Mr. Moore. 



13. „ „ from a specimen in British Museum. 

 14, 15, 16, 17. ,, „ different specimens from Ilminster. 



18. ,, ,, perfect interior, showing the loop magnified. 



18a. ,, „ side view. 



183. ,, „ fragment, showing the crura and muscular im- 



pressions. 



