44 DUBLIN UNTTERSITT 



4. Chiton strigillatus ( Wood). Sutton. 

 5 r miocenicus (Michelotti). Turin. 



I subapenninus (Cantraine). ? 



6. „ subcajetanus Poli, (ex fide U Orb). Turin. 



7. „ transenna (Lea). Virginia. 



Lower Tertiary. 



8. Chiton antiquus (Conrad). Alabama. 



9. „ Grignonensis (Lamarck). Grignon. 



Great Oolite, or Bathonian. 



10. Chiton Koninckii (Eudes Deslongch). Langrune. 



•" Lias. 



11. Chiton Deshayesii (Ter quern). Thionville. 



Trias. 



12. Chiton (?) Cottai (Oeinitz). Bunter Sandstone. 



13. „ A small and undescribed species, found by Mr. C. Moore, 



near Frome, Somersetshire.* 



Permian. 



14. Chiton Loftusianus (iTew^). Durham. 



15. ,, Howseanus (Kirhby). ,, 



16. „ ? cordatus (KirTiby). ,, 



17. Chitonellus Handcockianus (KirTcby). Durham. 



18. ,, distortus (Kirhby). „ 



19. ,, antiquus (Howse), sp. ,, 



Carboniferous Limestone. 



20. Chiton concentricus (De Koninek). Vise, 

 gemmatus (De Koninek). Vise. 



„ var- mosensis (De Ryckholt). 



„ viseticola (De Ryckholt). 



„ legiacus (De Ryckholt). 



,, eburonicus (De Ryckholt). 



»M 



n 



y* 



* Mr. Charles Moore has favoured me with the additional information of his having 

 collected examples of the genus Chiton in the following formations in England, in which 

 they had not hitherto been observed, viz. : — Bradford clay, Hampton, near Bath, a 

 single plate ; Upper Lias, near Ilminster, about a dozen separate plate3, all belonging to 

 one species ; and in the Triassic beds near Frome, above alluded to, where the plates of a 

 small, and not uncommon, species occur. 



