282 



UPPER EOCENE FORMATIONS. 



[Oh. XTT. 



a. Upper marls, distinguished by the abundance of Melania turritissima, Forbes 



(fig. 211). 



b. Lower marl, characterized by Cerithium mutabile, Cyrena pulchra, &c, and 



by the remains of Trionyx (see fig. 212). 



Fig. 211. 



Melania turritissima, Forbss. Fragment of Carapace of Trionyx. 

 Bembridge. Bembridge Beds, Isle of "Wight. 



c. Green marls, often abounding in a peculiar species of oyster, and accompanied 

 by Cerithia, Mytili, an Area, a Nucula, &c. 



Fig. 213. 



Fi£. 214. 



Fiff. 215. 



Bulimus ellipticus, Sow. Helix occlusa, Edwards. 

 Bembridge Limestone. Bembridge Limestone, 



I- nat. size. Isle of Wight. 



Paludina orbicularis. 

 Bembridge. 



d. Bembridge limestones, compact cream-colored limestones alternating with shales 

 and marls, in all of which land-shells are common, especially at Sconce, near 



Fig. 216. 



Fig. 217. 



Fig. 2ia 



Vlanorbis discus, Edwards. 

 Bembridge. i diam. 



Lymnea longiscata, Brard. 

 Nat. size. 



Chara tuberculata. 

 Bembridge Lime- 

 stone, I. of Wight. 



