56 LAMELLIBRASrCHIATA. 



Cyrena arenaria (?). 



Mon. Pal. Soc. (Siipp.), 1877, pi. b. figs. 8", 8^ p. 16. 

 Horizon and Localities. 



Oligocene. — Ileadon Beds. Hordwell; Headon Hill; Mead End. 



C3rreiia Britannica, Deshayes, 1843-50. 



Cyclas deperdita. 

 Mineral Conchology, 1817, pi. 163. fig. 1. (Sowerby Coll.) 



Cyrena Brifanniea. 

 Traits 'kXiva. Conchy. 1843-50, vol. i. 2nd part, p. C97. 

 Mon. Pal. Soc. (Supp.), 1877, pi. b. figs. 2% 2", p. 11. 



Horizon and Localities. 



Lower Eocene. — Wouhoich Beds. Elmstead Tunnel ^ Dulwich; Upnor; 

 Woolwich ; Shorn. 



Cyrena Charpentieri (Deshayes, MS.), Potiez and Michaud, 1844. 



Cyrena Charpentieri. 

 Gal. MoU. Mus. Douai, 1844, vol. 2. pi. Ixi. figs. 18, 10, p. 191. 



Horizon and Locality. 

 Middle Eocene. — Bracklesham Beds. Bracklesham Bay. 



Cyrena cordata, Morris, 1854. 



Cyrena cordata. 

 Quart. Journ. Geol. Soc. 1854, pi. ii. figs. 7-0, p. 158. 

 Mon. Pal. Soc. (Supp.), 1877, pi. a. figs. 2''-2", p. 4. 



Horizon and Localities. 



Lower Eocene.— Woolwich Beds. Elmstead ; Peckham ; Dulwich ; Upnor, 



Cyrena crassa (?), Deshayes, 1824. 



Cyrena crassa (?). 

 Coq. Foss. Paris, 1824, vol. i. pi. xviii. figs. 14, 15, p. 119. 

 Mon. Pal. Soc. (Supp.), 1877, pi. a. figs. 10», 10", p. .3. 



Horizon and Locality. 



Lower Eocene. — Woohcich Beds. Woolwich. 



Cjrrena cuneifbrmis, J. Sowerby, 1817. 



Cyclas cuneiformis. 

 Minei-al Conchology, 1817, pi. 162. figs. 2, 3. (Sowerby Coll.) 



Cyrena cuneiformis. 

 Mon. Pal. Soc. (Supp.), 1877, pi. a. figs. .3»-3'-, p. 5. 



Horizon and Localities. 



Lower Eocene. — Woohoich Beds. Elmstead; Woolwich; Upnor; Green 

 Street Green ; Shorn ; Charlton ; Peckham ; Bickley ; Chislehurst ; 

 Plum.stead. 



