PLATE LII. 

 Inoceeamus (continued). 



Figs. 



1. I. inconstans var. striatus, Mant. Upper Chalk, Norfolk (probably zone 

 of Holaster planus, Swaffham). Norwich Museum, a, right valve; 

 b, posterior view. (P. 292.) 



2, 3. 7. inconstans var. sarumensis, Woods. Zone of Actinocamax quadratus, 

 East Harnham. Dr. Blackmore's Collection. 2a, right valve ; 2b, 

 dorsal view ; 3a, left valve ; 3b, dorsal view. (P. 293.) 



4 — 6. 7. Lamarcki, Park. Zone of Holaster planus. (P. 307.) 



4. Newmarket. Sedgwick Museum, Cambridge, a, left valve ; b, right valve 



with umbo of left valve ; c, anterior view. 



5. Stonehall pit, Dover. Collieries' Museum, Dover, No. 2134. a, left valve ; 



b, posterior view. 



6. Shakespeare's Cliff, Dover. Collieries' Museum, Dover, No. 2133. a, right 



valve with umbo of left valve ; b, posterior view. 



