rOSSU. FAUNA. 149 



PLATE LXV. 



Fossil Shells. 



Fig. 1. A single valve, viewed interiorly, of a fine shell {Panopcea Aldrovandi, of Faujas St. 

 Fond) from the Pleistocene or J^ewer Tertiary strata, that form a chain of low hills 

 near Palermo, in Sicily. The shells in these deposits comprise almost all the genera 

 and species that now inhabit the Mediterranean. They occur in the most beautiful 

 state, deprived only of their colour; and groups are often met with of extreme 

 elegance. The cabinet of the Marquess of Northampton contains an extensive and 

 unrivalled series of these fossils, coUected during his Lordship's residence at 

 Palermo. 



Figs. 2, & 4. A boring bivalve {Fistulam or Lithodomm) from the Oolite, Bath. 



Figs. 3, & 5. Valves of a small Oyster from the Crag of Essex. 



Fig. 6. A group of Lithodomi in limestone from the Oolite, Bradford, Wilts. 



Fig. 7. A detached specimen from the same, showing the enclosed bivalve. 



Figs. 8, & 10. Fine but imperfect specimens of a species of Teredo (Teredhm personata, of 

 Lamarck), from the Plastic clay of Epernay, France. 



Fig. 9. A snail-shell {Helix arbusforim) found associated, and evidently contemporaneous, 

 with bones of Mammoth, and extinct species of Deer, and other mammalia. From 

 Brentford, in a bed of light calcareous earth, twenty feet below the surface. 



Fig. 11. -'A concamerated Teredo."-3Ir. FarUnson. I am unable to ascertain the nature 

 of this fossil. 



Fig. 12. A species of Fistulana, from France. 



Fig. 13. External surface of Chama squamosa of Brander. London clay, HordweD. 



Figs. 14, & 15, are the anchylosed caudal vertebra of the tails of fishes. From the London clay, 

 Isle of Sheppey. 



Fig. 16. "A small oyster with a spathose structure."— J/r. Parkinson. This shell is probably 

 the flat valve of a species of Dianchora, of Sowerby ; from the Chalk. 



