324 



CRETACEOUS LAMELLIBRANCHIA. 



/. Cuvi&ri, Mantell (Figs. 09, 84), both from the zone of Micraster cor-anguinum 

 of Southeram ; in the British Museum, Nos. 5845, L22094. 



I. Brongniarti, Mantell (Fig. 68), from Lewes or Brighton (probably zone of 

 Micraster cor-a/n.gninuw) ; in the British Museum, No. 4751. 



Fig. 83. — Anterior view of specimen shown in Fig. 82. x j. 



/. Webster i, Mantell (Fig. 71), from South Street [= Southeram], Lewes 

 (probably zone of Micraster cor-testudinarium) ; in the British Museum, No. 4759. 



I. undulatus, Mantell (Plate LIII, fig. 3), from Southeram, Lewes (probably 

 zone of Ilolaster planus) ; in the British Museum, No. 4767. 



