ALBIAN FOSSILS DISCOVERED AT O&EFORD FITZPAtNE. 89 



Plagiostoma, Mantell : Geology of Sussex, 1822, PL 19, fig. 1, 

 p. 129. 



Plagiostoma elongata, J. de C. Sowerby : Mineral Concliology, 

 1827, Vol. 6, PI. 559 ; fig. 2. 



Lima parallela, Orbigny : Paluontologie Franfaise, Terrains 

 Cretaces, Lamellibranchia, 1846, PI. 416, figs. 11-14, p. 539. 



The anterior and posterior sides of this species are nearly parallel 

 to each other. The shell is of oval contour, compressed and 

 ornamented with about IS elevated radial costse, which, when well 

 preserved, are crossed by fine longitudinal striae. The hinge line is 

 short, straight; and oblique ; no intermediate ribs as in some allied 

 forms. Several fragmentary examples were obtained at Okeford 

 Fitzpaine, that selected for figuring being a cast, found in the 

 sandy-rock division of the H. interruptus zone, which, however, 

 shows very well the general form. of the shell. 



Dimensions Height =39 } 



T n, n~ \ Millimetres. 

 Length = 2o ) 



EANGE OF SPECIES. Albian to Senonian. 



LOCALITIES. Folkestone, Black Ven, Cambridge, Maidstone, 

 Hamsey, Gravesend, Drumochose (Ireland), &c. ; Wissant, 

 Ardennes, Meuse, St. Croix, &c. 



MYTILUS SUBSIMPLEX, Orbigny. 

 PL iii., fig. 13. 



Modiola simplex (Deshayes Ms.), Leymerie : Mem. Soc. GeoL, 

 France, 1842, Vol. 5, PL 7, fig. 8, p. 8. 



Mytilus simplex, Orbigny : Paleontologie Frangaise, Terrains 

 Cretaces, Lamellibranchia, 1844, PL 338, figs. 1-4, p. 269, non 

 Def ranee 1824. 



Mytilus (Modiolus) simplex, Forbes : Quart. Journ. GeoL Soc., 

 1845, Vol. 1, p. 248. 



Mytilus sulsimplex, Orbigny : Prodrome Paleontologie, 1850, 

 Vol. 2, p. 81. 



Mytilus gurgitis, Pictet and Eoux : Desc. Moll. Gres Verts 

 Geneve, 1852, pi. 40, fig. 2, p. 481. 



