58 LAMELUBRANCHIATA. 



Cyrena oho vat a, ' 



Mon. Pal. Soc. (Supp.), 1877, pi. b. figs. :i"-S", p. V2. 

 Horizons and Localities. 



Oligocene. — Headon Beds. Headon Hill ; Lyndhurst : Roydon ; Ilord- 

 well ; Colwell Bay ; near Reaulieu Road. 



(?) Upper Eocene. — Barton Beds. Barton Cliff. 



Cyrena obtusa (Forbes, MS.), Morris, 1856. 



Cyrena obtusa. 



Forbes's ' Isle of Wight,' Mem. Geol. Siirv. IS-^Ci, pi. iii. figs. 4, 4», 4\ p. 14!). 



Mon. Pal. Soc. (Supp.), 1877, pi. b. figs, m'-li'; p. 12. 

 Horizons a7id Localities. 



Oligocene. — Bembridge Beds. Bembridge ; Hempstead. — Headon Beds. 

 Lyndhurst; Hordwell. 



Cyrena pisum(?), Deshayes, 1824. 



Cyrena jnswn. 



Ooq. Foss. Paris, 1824, vol. 1. pi. xix. figs. lO-l'i, p. 117. 

 Horizon and Localities. 



Oligocene. — Headon Beds. Hordwell ; Mead End. 



Cyrena pulchra, J. de C. Sowerby, 1826. 



Cyclas pulcher. 

 Mineral Conchology, 1826, pi. 527. fig. 1. 



Cyrena pulchra. 

 Forbes's 'Isle of Wight,' Alem. Geol. Surv. 1856, pi. iii. fig. 1, p. 148. 

 Mon. Pal. Soc. (Supp.), 1877, pi. b. figs. 7», 7", p. 15. 



Horizon and Locality. 

 Oligocene. — Bembridge Beds. Hempstead. 



Cyrena pulchra, var. Wrightii (Forbes, MS.), Morris, 1856. 



Cyrena Wrightii. 

 'Forbes's 'Isle of Wight,' Mem. Geol. Surv. 1856, pi. iv. figs. 11, 11», 11'', 



p. 153. 

 Mon. Pal. Soc. (Supp.), 1877, p. 16. 



Horizon and Localities. 

 Oligocene. — Headon Beds. Headon ; Colwell Bay ; Hordwell. 



Cyrena semistriata, Deshayes, 1830. 



Cyrena sejnistriata. 

 Encycl. Mi^th. 18.30, vol. ii., 2nd part, p. 52. 

 Forbes's ' Isle of Wight,' Mem. Geol. Surv. 1856, pi. iii. fig. 2, p. 148. 



Horizons and Localities. 



Oligocene. — Hemjjstead Beds. Hempstead. — Bembridge Beds. Bembridge; 

 East Cowes. 



Cyrena semistriata, var. fortis, Edwards (MS.). 



Horizon and Locality. 

 Oligocene. — Hempstead Beds. Hempstead. 



