88 ALBIAN FOSSILS DISCOVERED AT OKEFORD FlTZPAINE. 



KANGE OF SPECIES. Barremian to Albian. 

 LOCALITIES. Atherfield, Sandown, Folkestone, Cambridge, Black- 

 down, &c. 



INOCERAMUS CONCENTRICUS, Parkinson. 



PI. iii., fig. 12. 

 Inoceramus concentricus, Parkinson : Trans. Geol. Soc., London, 



1820, Vol. 5, PI. 1, fig. 4, p. 58. J. Sowerby : Mineral Conchology, 



1821, Vol. 3, PL 305, p. 183. Mantell : Geology of Sussex, 1822, 

 PI. 19, figs. 15, 19, 20, p. 95. 



Inoceramus yrypliceoides, J. de C. Sowerby : Mineral Conchology, 

 1828, Vol. 6, PI. 584, fig. 1, p. 161. 



Inoceramus propinquus, Goldfuss : Petrefacta Germanise, 1836, 

 Vol. 2, pi. 109, fig. 9, p. 112. 



Inoceramus concentricus, Orbigny : Paleontologie Franchise, 

 Terrains Cretaces, Laraellibranchia, 1846, PI. 404. p. 506. 



Two examples of this shell are in the collection, the largest 

 measuring 130 by 95 millimetres, the other, which is now figured, 

 being about half that size. The shell varies slightly according to 

 age ; when young it is short and very convex, in the older state it 

 spreads out and becomes somewhat compressed. The specimen 

 figured has both valves in contact, the smaller one showing an 

 oblique hinge line and some obscure growth lines, whilst the larger 

 valve is ornamented with the characteristic concentric ridges and 

 grooves, placed at regular intervals from each other. 



Dimensions Height = 67 



Millimetres. 



Length = 38 



RANGE OF SPECIES. Albian. 



LOCALITIES. Folkestone, Golden Cap, Norfolk, Ilunstanton (?), 

 Black Ven ; Cambridge, Blackdown ; Wissant, d'Ervy, Gaty- 

 Gerosdot, Cheville, &c. 



LIMA PARALLELA, J. Sowerby. 



PI. iii., fig. 11. 



Modiola parallela, J. Sowerby : Mineral Conchology, 1812, 

 Vol. 1, pi. 9, fig. 1, p. 31. 



