416 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Mar. 14, 



Carboniferous Name. 



figs. 1 & 2 ; Davidson's Carb. Brach. 

 p. 14, pi. 1. figs. 23, 24, 27, 29, 30. 



2. *Spirifera Urii, Fleming, 1828. 

 Sp. Urii, Flem. Hist, of British Anim. 

 p. 376 ; and Dav. Carb. Brach. p. 58, 

 pi. 12. figs. 13, 14. 



3. Spiriferina octoplicata, J. de C. 

 Sowerby, 1827, Min. Con. p. 120, pi. 

 562. figs. 2-4 ; and Dav. Carb. Brach. 

 p. 31, pi. 7. figs. 37-47. 



4. *Camarophoria Crumena, Martin, 

 1809. Conchyliolithus Anomites Cru- 

 mena, Martin, Petrif. Derb. pi. 36. fig. 4. 



5. Terebratula rhomboidea, Phillips, 

 1836, G-eol. of York, vol. ii. pi. 12. figs. 

 18-28. 



6. 



7. Cythere elongata, Minister, 1830, 

 Jahrbuch f. Min. p. 65. n. 19. 



8. Cythere inornata, M'Coy, 1844, 

 Syn. Char. Carb. Foss. p. 167, pi. 23. 

 fig. 18. 



Permian Name. 



Martinia Clannyana, King, 1848, 

 Cat. of Organ. Rem. Aug. 19th, 1848 ; 

 andMon.Eng. Perm. Foss.p.134, pi. 10. 

 figs. 11-13. 



*8p. cristata, Schloth., 1816. Sp. 

 cristata, Sell. Beitr. z. Naturg. d. Verst. 

 in Akad. der Wissensch. zu Miinchen, 

 pi. 1. fig. 3. 



Terebratula Schlotheimi, Von Buch, 

 1834, Ueber Terebrateln, p. 37, pi. 11, 

 fig. 32. 



*Camarophona globulina, Phillips, 

 1834. T. globulina, Phillips, Ency. 

 Met. (Geology) vol. iv. pi. 3. fig. 3. 



*Lmgula Credneri, Ceinitz, 1848, 

 Versteinerungen des Zechst. p. 1 1, pi. 4. 

 figs. 23-29. 



C. elongata, Mini., Jones in King's 

 Mon. Perm. Foss. p. 62, pi. 18. fig. 5 ; 

 and Jones on Perm. Entom. in Trans, 

 Tynes. Field-Club, vol. iv. p. 159, pl.ll. 

 fig. 2. 



C. inornata, M'Coy, Jones in King's 

 Mon. Perm. Foss. p. 63, pi. 18. fig. 9; 

 and Jones on Perm. Entom. in Trans. 

 Tynes. Nat. Field-Club, vol. iv. p. 160, 

 pi. 11. fig. 6. 



Cythere (Bairdia) gracilis, M'Coy, 

 Jones in King's Mon. Perm. Foss. 

 p. 62, pi. 18. fig. 7 ; and Jones on Perm. 

 Entom. in Trans. Tynes. Nat. Field- 

 Club, vol. iv. p. 163, pi. 11. fig. 15. 



67. formosus, Ag., King's Cat. Org. 

 Rem. p. 14 ; and Mon. Perm. Foss. 

 p. 221 ; also BZowse in Trans. Tynes. 

 Nat, Field-Club, vol. iii. p. 239. 



; 



See Howse on Perm. Syst. of Nor- 

 thumb. and Durh. in Trans. Tynes. 

 Nat, Field-Club, vol. iii. p. 239. 



9. Bairdia gracilis, M'Coy, 1844, 

 Syn. Char. Carb. Foss. p. 165, pi. 23. 

 fig- 7. 



10. Gyracanthus formosus, Agassiz, 

 Poissons Fossiles, vol. iii. p. 17, pi. 5. 

 figs. 4-8. 



11. Pinites Brandlingi, Lindley. 



12. Trigonocarpon Na>ggerathi, Br. 



13. Sigillaria reniformis, Brongn. 



14. Catamites approximatus, Brngn. 



15. — — incsqualis (?), Lindley. 



In this list of species common to the Carboniferous and Permian 

 rocks, I have only included those which have been pronounced re- 

 enrrents by careful paleontologists. There are other species which 

 appear to be such, but which as yet have not been proved to be iden- 

 tical with the Carboniferous forms which they resemble. Among 

 the most prominent is a Polyzoon called Fenestella retiformis by 

 Permian palaeontologists, which bears so strong a resemblance to a 

 species in the Mountain Limestone (namely, Retejpora membranacecC) 

 that I almost believe them to be the same ; but as I have not yet 

 been able to examine a good celluliferous face of the Carboniferous 

 species, I cannot decide whether they are identical or not. 



It is not unlikely that some geologists may question the authenti- 

 city of the identifications already made ; for there are those who hold 



