PLATE XXVI. 
PLIcATULA (continued). 
Fes, 
1—11. P. inflata, Sow. Woodwardian Museum, Cambridge. Right valves 
(except fig. 7). (P. 139.) 
1—3, 5. Totternhoe Stone, Burwell. 
4. Lower Chalk, Burwell. 
6. Totternhoe Stone, Arlesey. 
the a a Reach. Left valve. 
8. 3 ss Burwell. 
9. Lower Chalk, Burwell. 
10. Chalk Marl, Haslingfield. 
11. H. subglobosus zone, Cherry Hinton. 
12—18. P. Barroisi, Peron. Right valves, except figs. 13, 14. (P. 141.) 
12. H. planus zone, Dover. Dr. Rowe’s Collection. a, natural size; b, x 4. 
13. H. planus zone, Twyford. Woodwardian Museum. Left valve, a, natural 
size; b, xX 4. 
14. Top of I. cor-anguinum zone, North Foreland. Dr. Rowe’s Collection. 
Left valve, a, natural size; b,x 4. 
15. H. planus zone, Dover. Dr. Rowe’s Collection, a, natural size; b, x 4. 
16. Uintacrinus-band, Kingsgate, Margate. Dr. Rowe’s Collection. a, natural 
size; 6, x 4. 
17. H. planus zone, Twyford. Woodwardian Museum. a, natural size; b, x 4. 
18. Chalk Rock, near Winchester. Mr. R. M. Brydone’s Collection. a, natural 
size; b, x 4. 
19—22. P. sigillina, Woodw. (P. 143.) 
19. B. mucronata zone, Hartford Bridge, Norwich. Woodwardian Museum. 
a, interior of right valve; b, central part of same x 2. 
20, Top of M. cor-testudinarium zone, Chatham. Dr. Rowe’s Collection. 
Left valve. 
1. Same horizon, etc. Left valve x 2. 
bo po 
2. M. cor-testudinarium zone, Chatham. Museum of Practical Geology, 
No. 179. eft valve. a, natural size; b, x 2. 
