PLATE LIV. 



Inoceramus (continued). 

 Figs. 



1. I. Lamarchi, Park., var. S waff ham, Norfolk (probably zone of Holaster 

 planus). Variety connecting I. Lamarchi with I. cordiformis. 

 Norwich Museum, No. 3298. a, right valve; h, anterior view. 

 (P. 335.) 



2 — 4. I. cordiformis, Sow. Upper Chalk. (P. 334.) 



2. Zone of Micrasler cor-anguinum, Gravesend. Sedgwick Museum. Eight 

 valve. 

 3, 4. Same zoue, Micheldever. Dr. Blackmore's Collection. 3a, left valve ; 

 3b, dorsal view of both valves ; 4, right valve. 



5—7. I. costellatus, Woods. Chalk Rock. (P. 336.) 



5. Cuckhamsley. Sedgwick Museum, a, left valve ; b, anterior view. 

 6, 7. Blount's Farm, Marlow. Museum of Practical Geology, Nos. 25510, 

 25511. 6a, right valve ; 6b, anterior view ; 6c, dorsal view ; 7, right valve. 



8. I. tuber •culatus, Woods. Upper Chalk (zone of Actinocamax quadratus), 

 Brighton. Brighton Museum. Part of right valve. (P. 302.) 



