CARBnD^E. CYRENID^. 55 



Protocardium turgidiim, Solandcr, 1766. 



Cardimn turyidmn. 

 Rrander's ' Foss. Ilant.' 17()0, pi. vii. tig. OC, p. 38. 

 Mineral Concliology, 1822, pi. 346. fig. 1. (Sowerby Coll.) 



Horizon and Locality. 



Upper Eocene. — Barton Beds. Barton. / 



Protocardium Wateleti, Deshayes, 1860. 



rrotocardium Wateleti. 



Desc. Anim. .sans Vert. 1800, vol. 1. pi. liv. figs. 16-18, p. 570. 



Horizon and Locality. 



Lower Eocene. — London Clay. Portsmouth. 



Genus HEMICARDIUM (Klein, 1753), Cuvier, 1817. 



Ostracologicoe, 175.3, pi. x. fig. 39, p. 137. 

 Kegne Animal, 1817, vol. ii. p. 470. 



Hemicardium cymbulare, Lamarck", 1819. 



Cardium cymhdare. 

 Hist. Nat. Anim. sans Vert. 1819, vol. G. part i. p. 19. 

 Coq. Foss. Paris, 1824, vol. 1. pi. xxix. figs. 11, 12, p. 178. 



Horizon and Localities. 

 Middle Eocene. — Bracklesham Beds. Huntingbridge ; Brook. 



Family CYRENID^, H. & A. Adams. 



Genus CYRENA, Lamarck, 1818. 

 Hist. Nat. Anim. san.s Vert. 1818, vol. 5. p. 551. 



Cjrrena aduncaj Edwards (MS.). 



Horizon and Locality. 



Lower Eocene. — Thanet Sands. Heme Bay. 



Cj^rena sestuarina, Edwards (MS.). 



Horizo7i and Locality. 

 Oligocene. — Headon Beds. Ilordwell, 



Cyrena altirupestris, Edwards (MS.). 



Horizon and Locality. 



Upper Eocene. — Barton Beds. High Cliff. 



Cyrena arenaria (?) (Forbes, MS., 1854), S. V. Wood, 1877. 



Ci/rena arenaria. 

  Morris's Cat. Brit. Foss. 1854, 2nd ed. p. 199. 

 Forbes's Isle of Wight, Mem. Geol. Surv. 1866, p. 88. 



