104 GASTEROPODA. 



Family HAEPID^, Troschel. 



Genus HARPOPSIS, Karl Mayer, 1877. 

 Beit. Geol. Karte Schweiz, 1877, Lief. xiv. Abthg. ii. pp. CO, 94. 



Harpopsis stromboides, Hermanns, 1781. 



Succinum stromhoides. 



Naturforschur, 178], vol. 10. pi ii. figs. 5, 6, p. 54. 



Coq. Foss. Paris, 183.5, vol. ii. pi. Lxxxvi. figs. 8-10, p. 047. 



Dixon's ' Sussex,' 1850, pi. vii. fig. 33, p. 106. (Dixon Coll.) 



Horizon and Localities. 

 Middle Eocene. — Bracldesham Beds. Bracklesham Bay ; Bramsbaw ; 

 Brook ; Stubbington ; Iluntingbridge. 



Family CASSIDIT)^, Adams. 



Genus CASSIS (Klein, 1753), Martini, 1773. 



OstracologiciE, 1753, pi. vi. fig. 102, p. 01. 

 Conchylien-Cabinet, 1773, vol. 2. pis. xxxii.-xli. p. 15. 



Morio, Montfort, 1810. 

 . Concbyl. Syst. 1810, vol. 2. p. 478. 



Cassidaria, Lamarck, 1812. 

 Extrait Oours Zool. 1812, p. 119. 



Cassis ambigua, Solandcr, 1766. 



Bwcinum omhiquum. 

 Brauder's Toss, llant.' 1706, pi. iv. fig. 66, p. 28. 



Cassis striata. 

 Mineral Conchology, 1812, pi. 6, four lower figures. (Sowerby Coll.) 



Cassidaria ambigua. 

 Dixon's ' Sussex,' 18.50, pi. vii. fig. 44 ; pi. xv. fig. 9, pp. 105, 120. 



Horizons and Localities. 



Oligocene. — Headon Beds. Brockenhurst ; Roydon ; Wbitley Eidge. 

 Upper Eoceue. — Barton Beds. Barton. 

 Middle Eocene. — Bracldeslxam Beds. Bramsliaw. 



Lower E<icene. — London Clay. Southampton ; lligligate ; llighgate Wood; 

 ILampstead Tunnel ; Bognor; Sheppey; Eincliley; Belsize Lane. 



Cassis calantica, Deshayes, 1835. 



Cassis calantica. 

 Coq. Foss. Paris, 1835, vol. ii. pi. Ixxxv. figs. 17-19, p. 640. 



Horizon and Locality. 



Middle Eocene. — Bracklesham Beds. Iluntingbridge. 



Cassis contabulata, Edwards (MS.). 



Ilorizi/n and Localitii. 



Lower Eocene. — London Clay. Potter's Bar. 



