PALAEOZOIC. 



CONCHIFERA. 



PERMIAN. 



LOWER 

 GROUP. 



UPPER 

 GROUP. 



SPECIES. 



Sub-Kingdom, MOLLUSCA. 



Lamelltbhanchiata. Blainv. 

 Class, CONCHIFERA. Lamarck. 



Pelecypoda. Goldfuss. 

 Group, Monomtaria. Lamarck. 



MYTILID.E. 

 Aucella Keyserling, 1846 



Mytilus \ 



Myalina \ (pars) Auctorum 



Modiola j 



— Hausmanni Goldf. 



Atioulid^. 



Avicula Klein, 1753 . 



Monotis Brown, 1830. 



— Garforthensis King 



— pinnseformis Geinitz 



— radialis Thill 



— speluncaria Schloth 



Bakevellia King, 1848 .... 



ATICULID^;. 

 Gervillia Defrance, 1820. 



Bakevellia King, 1848 .... 



Mytilus Linnaeus, 1758 . 



— antiqua Miinst 



bicarinata King ... 



infiata Brown 



keratophy ga Schloth. 



Sedgwickiana King 



tumida King 



364 



I 



I 



I 



1 

 I 



REFERENCES. 



Mytilus, Petrcfact. Germanise, vol. ii, p. 168, t. 138, f. 4, 1837. Myt. squamosus, 

 Sow. Trans. Geol. Soc. Lond. 2 ser. vol. iii, p. 120. Myt. acuminatus. Sow. Phill. 

 Ency. Geol. vol. i, p. 190, f. 2, 1837; ib. De Verneuil, Bull. Soc. Geol. de France, 

 1 ser. vol. i, p. 32, 1844. Mytilus Hausmanni, Goldf. Geinitz, Grundriss. d. 

 Versteinernngen, p. 453, 1846; p. 9, 10, t. 4, f. 12, &c. Mytilus squamosus, 

 Sow. King, Mono. Brit. Perm. Foss. Pal. Soc. p. 159, t. 14, f. 1-7. Aucella 

 Hausmanni, Goldf. Geinitz, Dyas. Zechst. und das Both. p. 72, 73, t. 14, f. 8-16. 



Mono. Brit. Perm. Foss. Pal. Soc. p. 157, t. 13, f. 24. 



Dyas. Zechst. und das Roth. p. 77, t. 14, f. 1-4. P. prisca, Howse. 



Vide A. speluncaria. 



Gryphites, Akad. Munch, p. 30, t. 5, f. 1. Av. gryphteoides, Sow. Trans. Geol. 

 Soc. Lond. 2 ser. vol. iii, p. 119. Avicula, Geinitz Versteinerungen, p. 10, t. 4, 

 f. 18, 19. Monotis, King, Mono. Brit. Perm. Foss. Pal. Soc. p. 155, t. 13, f. 5-21. 

 Avicula speluncaria, Schloth. Geinitz, Dyas. Zechst. und das Roth. p. 74, t. 14, 

 f. 5-7. Avicula (monotis) radialis, Phill. Ency. Met. vol. iv, t. 3, f. 5. King, 

 Mono. Brit. Perm. Foss. Pal. Soc. p. 157, t. 13, f. 22, 23. 



Vide Gervillia. 



Avicula, Goldf. Petref. Germ. pt. 2, p. 126, t. 116, f. 7. Avicula inflata, A.Bin- 

 neyi, A. discors, Brown, Trans. Manch. Geol. Soc. vol. i, p. 65, t. 4, f . 25, 28, 

 1 841. Gervillia, Howse, Notes on the Perm. Syst. p. 29. Bakevellia antiqua, 

 Miinst. King, Mono. Brit. Perm. Foss. Pal. Soc. p. 168, t. 14, f. 28-34. Gerv. 

 antiqua, Geinitz, Dyas. Zechst. und das Roth. p. 78, t. 14, f. 17-20; ib. Kirkby, 

 Q. J. Geol. Soc. vol. xvii, p. 303. 



Vide G. keratophyaga. 



Vide G. antiqua. 



Mytilites, Akad. Munch, vol. vi, p. 30, t. 5, f. 2. Avicula keratophyga, Goldf. 

 Petrefacta, pt. 2, p. 126, t. 116, f. 6; ib. Howse, Trans. Tyneside Nat. Field Club, 

 vol. i, p. 249, 1848. Gervillia, Howse, Notes on the Perm. Syst. p. 30, 1858. 

 Bakevellia, King, Mono. Brit. Perm. Foss. Pal. Soc. p. 167, t. 14, f. 24-27. Ger- 

 villia, Geinitz, Dyas. Zechst und das Roth. p. 77, t. 14, f. 21, 22. B. bicarinata, 

 King, Mono. Perm. Foss. Pal. Soc. p. 170, t. 14, f. 41, 42. 



Bakevellia, King, Mono. Brit. Perm. Foss. Pal. Soc. p. 171, t. 14. f. 38-40. Ger- 

 villia, Geinitz, Dyas. Zechst. und das Roth. p. 78, t. 14, f. 23-25. 



Bakevellia, King, Mono. Brit. Perm. Foss. Pal. Soc. p. 170, 1. 14, f. 35-37. Avicula 

 inflata, Brown, Howse, Trans. Tyneside Nat. Field Club, vol. i, p. 250. 



