MACTHIDJE. — MTID^. 85 



Cnrdilia Iteviuscula. 



Dixon's ' Sussex,' 1850, pi. ii. fig. 6», p. 165. (F. E. Edwards Coll.) 

 Cardilia Michelini. 



Desc. Anim. sans Vert. 1857, vol. i. pi. xvii. figs. 10-14, p. 296, 

 Horizon and Locality. 



Middle Eocene. — Bracklesham Beds. Bracklesham Bay. 



Cardilia radiata, Edwards (MS.). 



Horizon and Locality. 



Upper Eocene. — Barton Beds. Barton. 



Genus ANATINELLA, G. B. Sowerby, 1831. 

 Genera Rec. Foss. Shells, 1831, no. xl. pi. 41. 



Anatinella (?) tenerrima, Edwards (MS.). 



Horizon and Locality. 

 Lower Eocene. — London Clay. Haverstock Hill. 



Family MYID^E, Lamarck. 



Genus MYA, LinniEUs, 1767. 

 Systema Natur®, 1707, vol. i. p. 1112. 



Mya angustata, J. de C. Sowerby, 1826. 



Mya (?) anqustata. 

 Mineral Conchology, 1826, pi. 531. fig. 1. 



Horizons and Localities, 

 Oligocene. — Bemhridge Beds. Hempstead. — Headon Beds. Mead End ; 

 HordweU; Headon Hill. 



Mya Bartonensis, Edwards (MS.). 



Horizon and Locality. 

 Upper Eocene. — Barton Beds. Barton. 



Mya donacialis, Edwards (MS.). 



Horizon and Ljocality. 



Oligocene. — Hempstead Beds. Hempstead. 



Mya minor (Forbes, MS.), Morris, 1856. 



Mya (Panopcea) minor. 

 Forbes's ' Isle of Wight,' Mem. Geol. Surv. 1856, pi. ii. fig. 4, and pi. iii. 

 fig. 3, pp. 146, 149. 



Horizons and Localities. 

 Oligocene. — Hempstead Beds. Hempstead.- — Bemhridge Beds, Hempstead. 



Mya producta, Edwards (MS.). 



Horizon and Localities. 



Oligocene. — Headon Beds. Col well Bay ; Headon Hill. 



