Figs. 
PATH ex Vaile 
Genus—SertiFer, Pécluz. 
1— 12. S. lineatus (Sow.). (P. 106.) 
a 
10. 
11. 
. Hythe Beds, Lympne. Museum of Practical Geology, No. 6595. a, left valve ; 
b, dorsal. 
. Same locality, &e., No. 6595. a, right; b, antero-ventral. 
. Hythe Beds, Hythe. Museum of the Geological Society. Right valve. 
. Hythe Beds, Lympne. Museum of Practical Geology, No. 6595. a, left valve: 
b, antero-ventral. 
. Chalk Marl, Chardstock. Museum of Practical Geology, No. 6596. a, left valve; 
b, antero-ventral outline. 
. Cenomanian (Bed 12), Kempstone Rocks (Sidmouth). Museum of Practical 
Geology, No. 6773. a, antero-ventral outline; 6, right valve x 14; ¢, orna- 
mentation near the centre of the valve x 12; d, ornamentation near the posterior 
margin x 12. 
. Cenomanian (Bed 12), Axmouth. Mr. Meyer’s Collection. Antero-ventral of 
left valve. 
. Cenomanian (Bed 12), Dunscombe. Mr. Meyer's Collection. Left valve. 
. Chalk Rock (Reussianwm zone), Cuckhamsley. Montagu Smith Collection, Wood- 
wardian Museum. Right valve. For figures of a larger example from this zone 
see ‘Quart. Journ. Geol. Soc.,’ vol. li, 1897, pl. xxvii, figs. 11, 12. 
Chalk Rock, Dullingham. Woodwardian Museum. Internal mould. a, right 
valve; b, antero-ventral. 
Chalk Rock, Winchester. Mr. R. M. Brydone’s Collection. a, left valve; b, ante1o- 
ventral. (Figured ‘Quart. Journ. Geol. Soc.,’ vol. liii, 1897, pl. xxvii, figs. 9, 10.) 
Flint gravel (derived from Upper Chalk), near Ventnor. Left valve, somewhat 
flattened by crushing. 
Genus—DREISSENSIA, van Beneden. 
13—15. D. lanceolata (Sow.). Crackers, Atherfield. (P. 110.) 
13. 
14. 
15. 
Left valve. Wiltshire Collection. 
Left valve. Woodwardian Museum. 
Right valve. Woodwardian Museum. 
