PLATE VIII. 



CRETACEOUS SPECIES. 



Fig. 



1. Terebratula carnea, Sow. A typical shape, Chalk, Trimmingham. 



2. „ ,, Interior of ventral or dental valve. 

 2". „ ,, Interior of dorsal or socket valve. 



3. „ „ (var. elongata, Sow.). Norwich. 

 4 to 5. ,, „ Circular variety, from ,, 



6. ,, semi-globosa, Sow., from the Lower Chalk, near Lewes. 



7. „ ,, A circular specimen, from Gravesend. 



S. ,, ,, A remarkable variety, from Lewisham, Kent. 



0. „ „ Original figure of Sowerby's T. subrotunda. 



10 to 1 1. „ „ (var. T. bulla, J. de. C. Sow.). 



12. „ ,, A var., from Grays. 



13. ,, „ (var. T. albensis, Leymerie), from Charing, Kent. 



14. ,, ,, A malformation. 

 15 to 16. ,, ,, (var. T. albensis). 



17. ,, ,, (var. subundata, Sow.), from the Red Chalk, 



Hunstanton. 



15. ,, ,, from the Chalk with Quartz Grains, Evershot, 



Dorsetshire. 



