PLATE XXV. 
Genus—Pricatuta, Lamarck. 
Fis. 
1—4. P. placunea, Lam. Hythe Beds, Lympne. Museum of Practical Geology, 
No. 6781. 1, 2, 4, right valves; 1 6, anterior outline; 3, left valve. 
(P. 134.) 
5—12. P.Carteroniana, d’Orb. Lower Greensand, Upware. Right valves, except 
fig. 7 (left valve); 5), 6b, anterior outlines. Figs. 6—9, Woodwardian 
Museum. Figs. 5, 10—12 in Mr. J. F. Walker’s Collection. (P. 135.) 
13—21. P. gurgitis, Pict. and Roux. Gault, Folkestone, except figs. 18, 21. 
(P. 137.) 
13—15. Wiltshire Collection. Right valves; 13 8, left valve. 
16, 17. York Museum. Rightjvalves. 
18. Woodwardian Museum. Gault, Cambridge. Right valve. 
19. York Museum. Right valve. 
20. Part of left valve of 19. 
21. Woodwardian Museum. Cambridge Greensand (derived from the Gault). 
22—25. P. niiuta, Seel. (P. 138.) 
22, 24. Woodwardian Museum. Cambridge Greensand. 
23. Wiltshire Collection. Red Limestone, Speeton. 
Qos ns “ Red Limestone, Hunstanton. a, outline, natural 
size; b, x 3. 
