PALEOZOIC. 



CONCHIFEKA. 



CAMBRIAN AND SILURIAN. 



CAMBRIAN. LOWER SIL. TOPEE SILURIAN. 



SPECIES. 



Sub- Kingdom, MOLLUSCA. 

 Class, PELECYPODA 



Group, MONOMYABIA. 

 AVICFLID^. 



Ambonycbia Sail, 1843 ... 



— tumida Sottas 



ATICULID^. 

 Pterinsea Goldfuss, 1832 



— posidoniffiformis M'Coy 



Group, DlMTABIA. 



SOLENIDS. 



Cultellus Schumacher, i860 



— rectus Salter 



Nucttlid*. 



Leda Schumacher, 1817 



— ambigua Sollat 



MYTILID.E. 



Modiolopsis Sail, 1847. 



— acutipora Sollas 



inflata M'Coy j 



var. elevata , Sollat 1 



MTTiLiDa;. 



Orthonota Conrad, 1838 



— Davicula Sollat 





REFERENCES. 



ASIPHONIDA. 



Sil. District of Rbymney, Q. J. Geol. Soc. vol. xxxv, p. 497, 

 t. 24, f. 9. 



ASIPHONIDA. 

 Synop. Sil. Foss. Ireland, p. 22, t. 2, f. 10. 



SIPHONIDA. 



Ceratosolen, Ann. Mag. Nat. Hist. 3 ser. vol. v, p. 159; 

 ib. Sedgwick's Kendal Foss. Wordsworth's Letters on the 

 Lakes, 1843-46 (Appendix), f Solen rectus. 



SIPHONIDA. 



Sil. District of Rhymney, Q. J. Geol. Soc. vol. xxxv, p. 497, 

 t. 24, f. 7. 



ASIPHONIDA. 



Sil. District of Rhymney, Q. J. Geol. Soc. vol. xxxv, p. 496, 

 t. 24, f. 21, 32. 



Sil. District of Rhymney, Q. J. Geol. Soc. vol. xxxv. p. 496, 

 t. 24, f. 3. 



ASIPHONIDA. 



Sil. District of Rhymney, Q. J. Geol. Soc. vol. xxxv, p. 496, 

 t. 24, f. 3. 



3H 



417 



