PLATE V. 

 Lima (continued). 



Fios. 



1 — 4. L. (Flagiostoma) cretacea, "Woods. (P. 22.) 



1. Zone of Actinocamax q-iuidratus, East Harnliam. Dr. Blackmore's Collection. 



a, left valve ; h, portion x G. 



2. Zone of Micraster cor-testudinarium, Borstal. Mr. Dibley's Collection. Left 



valve. 



3. Zone of Holaster planm, Chovelcy. Sedarwick Museum. Left valve. 



4. Zone of Micraster cor-testudinarium, Cuxton. Mr. Dibley's Collection, a, left 



valve ; b, postero-ventral portion x 4. 



5. fj. {rh(gi(i><foma) sp. {?\iir.oi cretncea). Chalk (? zone of Ilolatitcr plamif;), 

 Burham. Se(lo:wick Museum. Left valve. 



G, 7. L. {PlnrjioKtoma) Marrotiana, d'Orb. Zone of Belemmtclla mucronata, 

 Norwich. Norwich Museum. (P. 24.) 



Off, left valve ;'6, mid- ventral portion x 3. 



7a, anterior area of right valve; h, median portion of left valve of same specimen. 



8—12. L. (Acesta) longa, Romer. (P. 2-5.) 



8. Lower Greensand, TJpware. Mr. J. F. Walker's Collection, a, right valve; b, 

 portion below the middle of the valve x 5. 

 9, 10. Lower Greensand, Brickhill. Right valves. Sedgwick Museum. 



11. Tealby Limestone (zone of Belemnites britnsvicensis). North Willingham. Right 



valve. Sedgwick Museum. 



12. Speeton Clay, Speeton. Museum of Practical Geology, No. 8781. a, right 



valve ; b, portion x 4. 



13. L. (Acesta) sp. Lower Greensand, West Dereham. Sedgwick Museum 

 (collected by Mr. Jukes-Browne), a, right valve; h, antero-dorsal 

 view ; c, portion X 5. (P. 26.) 



14,1-5. L. [Mantellnm) piinilh'hi, Sow. Lower Greensand {Penia -hed), Ather- 

 field. (P. 28.) 



14. Left valve. Sedgwick Museum. 



15. British Museum, No. L SOGH. a, left valve; b, dorsal view; f, portion at 



anterior end x 3 ; d, mid- ventral portion x 6. 



16—20. L. {Mantelliim) (janUina, Woods. Gault. 16—19, Black Ven. 20, 



Folkestone. Sedgwick Museum. (P. 31 .) 



16 a, left valve ; b, antero-dorsal view. 



17. Right valve. 



18a, ,, b, antero-dorsal view. 



19. „ median portion X 6. 



20. Loft valve 



