PLATE XIV. 
PrcruncuLus (continued). 
FIGS, 
1—7. P. sublevis, Sow. Greensand, Blackdown. (P. 67.) 
1 a—e, Wiltshire Collection, Woodwardian Museum. Right valve. 
2 a,b. Walton Collection, Woodwardian Museum. Right valve. 
3. Wiltshire Collection, Woodwardian Museum. Right valve. a, interior; 4, dorsal ; 
c, exterior xX 2; d, ornament of same x 5. 
4, Same Collection. Young form. a, left valve; 6, same X 2; ce, dorsal outline. 
5. Same Collection. a, 6, right valve; ce, dorsal outline. 
6, 7. Museum of Practical Geology, No. 6573. Left valves. 
8—12. P. wmbonatus (Sow.). Greensand, Blackdown. (P. 69.) 
8. Wiltshire Collection, Woodwardian Museum. a, right valve; 4, outline of interior 
of same; ¢, dorsal outline. 
9. Walton Collection, Woodwardian Museum. aa, left valve x 1}; 6, dorsal x 13; 
c, ornamentation x 5. 
10. Same Collection. a, left valve; 6, interior; ¢, dorsal. 
11. Wiltshire Collection, Woodwardian Museum. Right valve. 
12. Museum of Practical Geology, No. 6572. Right valve. 
13. P. euglyphus, Woods. Chalk Marl (Bed ii), Dunscombe. Collection of 
OC. J. A. Meyer. (P. 71.) 
13. a, right valve, outline; 6, dorsal outline of same; ¢, ornamentation on anterior 
part of shell x 4; d, ornamentation on posterior part ofshell x 4; e, same 
valve » 2, 
