PLATE LIII. 



Inoceramus {coh finned). 

 Figs. 

 ], 2. I. Lamnrd-i vur. Wehstcri, Mant. Upper Chalk. (P. 318.) 



1. Upper part of zoue of Holanter planus, Borstal pit. Mr. Dibley's Collec- 



tion. Right valve. 



2. Zone of Micraster cor-testudinarium, Chelsham, Sun-ey. British Museum, 



No. L2176. a, right valve (the autt-rior part concealed by flint) ; 

 6, posterior view. 



3. /. LamarcJci, Park. Soutlieram, Lewes (probably zone of Holaster 

 phtnus). British Museum, No. 4707. The Type of /. midulalus, 

 Mant. o, left valve; />, dorsal view. (1'. :319.) 



4__6. 1. Lamairl-i var. nplcnlis, Woods. (P. :110.) 



4. Zoue oi Ehynchonella Cuvieri, B.itchm. Sedgwick Museum, a, right valve; 



/;, anterior view. 

 5 Zone of Elu/nchonella Cuvieri, Peter's pit, Burhani. Mr. Dibley's 



Collection. Left valve. 

 6. Zone of Holaster planus, Newmarket. Sedgwick Museum, o, left valve ; 



h, anterior view. 



7. /. LamarcJd var. Cuderi, Sow. Zone of Terebratulina lif((, Royston. 



Sedgwick Museum. Right valve. (P. o20.) 



8. 7. conliformiii, Sow. Zone of Micraster cor-anrjuinum, Gravesend. 



British Museum, No. 43277. The Type. a. left valve; h, dorsal 

 view of both valve.-^. (P. 334.) 



