10 LAMELUBRANCHIATA. 



Family MYTILID^, Lamarck. 



Genus MYTILUS, Linnseus, 1766. 

 Systema Naturse, ed. 12, vol. i. p. 1165. 



Mytilns affinis, J. de C. Sowerby, 1826. 



Mytilus affinis. 



Mineral Concliology, 1820, pi. 5;i2. fi^. 1. 



Mon. Pal. Soc. 1861, pi. xii. figs. 1'>-1'', p. 61. (F. E. Edwards Coll.) 



Horizons and Localities. 



Oligocene. — Bembridge Beds. St. Helen's ; Bembridge ; Hempstead.- 



Headon Beds. Headon Hill ; ColweU Bay ; Hordwell. 

 Upper Eocene. — Barton Beds. Barton. 



Mytilus strigiUatus, S. V. Wood, 1861. 



MytUtis strigiUatus. 



Mon. Pal. Soc. 1861, pi. xii. fig. 2, p. 61. (F. E. Edwards Coll.) 



Horizon and Locality. 



Upper Eocene. — Barton Beds. Barton. 



Genus MODIOLA, Lamarck, 1799. 

 M6m. Soc. Hist. Nat. Paris, p. 87, no. 107. 



Modiola (?) Bartonensis, S. V. Wood, 1864. 



Modiola (?) Bartonensis. 



Mon. Pal. Soc. 1864, pi. xix. fig. 18, p. 75. (F. E. Edwards Coll.) 



Horizon and Locality. 

 Upper Eocene. — Barton Beds. Bai'ton. 



Modiola Clarendonensis, Edwards (MS.). 



Horizon and Locality. 

 Lower Eocene. — London Clay. Clarendon. 



Modiola (?) crassistriata (Edwards, MS.), S. V. Wood, 1864. 



Modiola (?) crassistriata. 

 Mon. Pal. Soc. 1864, pi. xix. fig. 16, p. 75. (F. E. Edwards Coll.) 



Horizon and Locality. 



Middle Eocene. — Bracklesham Beds. Bracklesham Bay. 



Modiola depressa, J. Sowerby, 1812. 



Modiola depressa. 



Mineral Conchology, 1812, pi. 8 (3 upper figures). (Sowerby Coll.) 



Mon. Pal. Soc. 1861, pi. xii. %. 4, p. 63. 

 Horizon and Localities. 



Lower Eocene. — London Clay. Finch ley; Highgate. 



