IXUCERAMUS. 



32'.> 



Fig. 88. — Inuccramits involatiis, Sow. Upper Chalk, locality imknciHn. The tyn'. British Museum, Xo. 



43268. Left valve. Natural size. 



Via. H9. — hiortr<imiit iiivolulua. Hkw. The ori^'inal of the .■^poeiiiieil fi.,'Uiivl iu I)i.\on'.s ' Ueol. Sussex." pi. 

 .vxviii. fi;;. -.i'. Upper Chalk, Charinj,'. Flint east. British Museuui, Xo. LS.J. Natunil size. 



