174 GASTEROPODA. 



Cerithioderma costulata, Edwards (MS.). 



Horizon and Locality. 

 Upper Eocene. — Barton Beds. Barton. 



Ceritbioderma grata, Deshayes, 1861. 



Mesostoma (/rata. 

 Desc. Anim. sans Vert. 1861, vol. ii. pi. xxviii. %s. 5-8, p. 418. 



Horizon and Locality/. 

 Lower Eocene.— iowrfon Clay. Highgate Wood Tunnel. 



Cerithioderma pulchra, Deshayes, 1861. 



Mesostoma pulchra. 



Desc. Anim. sans Vert. 18G1, vol. ii. pi. xxviii. figs. 13-16, p. 417. 



Horizon and Locality. 



Middle Eocene. — Braeklesham Beds. Brook. 



Family TEREBRID^, H. & A. Adams. 



Genus TEREBRA (Adanson, 1757), Lamarck, 1799. 

 Senegal (Coquillages), 1757, pi. 4, p. 49; M6m. Hist. Nat. Paris, 1799, p. 71. 



Terebra Bartonensis, Edwards (MS.). 



Horizon and Locality. 



Upper Eocene. — Barton Beds. Barton. 



Terebra cylindrella, Edwards (MS.). 



Horizon and Locality. 



Upper Eocene. — Barton Beds. Barton. 



Terebra fastigiata, Edwards (MS.). 



Horizon and Locality. 

 Upper Eocene. — Barton Beds. High Cliff. 



Terebra fastigiata, var. semilsevis, Edwards (MS.), 



Horizon and Locality. 



Upper Eocene. — Barton Beds. High Cliff. 



Terebra laevis, Edwards (MS.). 



Horizon and locality. 



Upper Eocene. — Bartrni Beds. High Cliff. 



Terebra plicatissima, Edwards (MS.). 



Horizon and Locality. 

 Upper Eocene.— barton Beds. High Clift. 



