PLATE LTI. 



Inocee Ajrrs {continued) . 

 Fios. 



1. I. inconstant v;iv. f<fyiafnf<, Mant. Upper Chalk, Norfolk (probal^l}* zone 

 of Holaster planus, Swaffliam). Norwicli Museum. ", rij^^bt valve; 

 h, posterior view. (P. 292.) 



2, 3. 7. incovfitftiis vur. safuincusis. Woods. Zone of Actuiocuniax qnadratus. 

 East Haruham. Dr. Blackmore's Collection. 2a, right valve ; 2&, 

 dorsal view; 3rt, left valve; 36, dorsal view. (P. 293.) 



4 — 6. /. Lmnarcld, Pai'k. Zone of TTohisfer jdainis. (P. 307.) 



4. Newmarket. Sedgwick Museum, Cambridge, a, left valve ; h, 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. 



