PLATE T.VI. 



OsTEEA (continued). 

 Fios. 



1. (>. vesiculosa (Sow.). Upper Greensand (zone of Schloi'nbachia rostrata), 

 Dinton. Museum of Practical Geology, No. 259o7. '», left viilvo ; 

 I), posterior view. (P. 374.) 

 2—16. 0. canaliculaia (Sow.). (P. 375.) 



2. Gault, Folkestone. Miiseum of Practical Geology. No. 20819. a. left 



valve ; b, right valve. 

 3—5. Gault, Folkestone. British Museum, Nos. L 4927, L 23044. 3a, left valve ; 



3fc, dorsal view. 4, interior of left valve. 5, interior of right valve. 

 G. Upper Greensand (zone of Pec/e« ns/)er), Warminster. Sedgwick Museum. 



a, left ; b, right valve. 



7. Zone of Holaster sulylohosvs, Burwell. Sedgwick Museum. Left valve. 



8. Melbourn Eock, Hitchin. Sedgwick Museum, a, left valve; I/, anterior 



view. 



9. Uintaerinus band, Devizes Road, Salishuiv. I>r. Blackmoie's Collection. 



Left valve. 

 l(t, 11. Zone of ^4c/i/iOff(»i(TX (/«n(7r«/««, East Harnhaiii. Dr. Blackmore's Collec- 

 tion. 10a, left valve; 106, portion x 5. 11a, right valve and part of 

 left valve; 116, posterior view. 



12. Same horizon and collection. West Harnham. a, left valve ; 6, posterior 



view. 



13. Zone of Adinocamax quadratus. Marwell, Hants. Sedgwick Museum. 



Left valve. 

 14, 15. Zone of Belemnitella mucronala, Norwich. Dr. Rowe's Collection. 14n, 

 l-jn, left valves; 146, 156, right valves and parts of left valves. 

 K;. Zone of BelemnHella mucronata, Alderhnrv Well. Dr. Blackmore's Collec- 

 tion. Left valve. 



17— li). (K sn)ui>hmn,^o\y. Upper Chalk. (P. 370.) 



17. Zone of J?e7em«(7e/?a »H«croj!rt<rt, Norwich. Norwich Museum, No. 2135. 



Left valve. 



18. Same horizon, locality and museum. No. 2130. o, right valve; 6, left 

 valve. 



19. Viidacrinus hand, Thanet coast. Dr. Rowe's Collection, a, right valve; 

 6, left valve. 



