340 



CRETACEOUS LAMELLTBRANCHIA. 



Inoceramus corrugatus, sp. iiov. Text-fig. 07. 



Bemarlc!^. — This species is at present known only by a small portion of one 

 valve. It is of the same general type as /. iVKjitatm, Sowerby, I. imviiforinis, 

 Willett, and /. xtihrard'n^soldes, Schliiter, Init owing to the presence of broad, 

 strong radial folds tlic radial ribs are arranged in groups of four or five. The 



Fin 97._Jnnccra)iiws enrnigatus, sp. nov. Upper Chalk, Wouldham Cement Quarry, Grays. Britisli 

 Museuiii, No. Ti22.")28 (discovered and presented )iy Col. C. E. Sliepherd). Natural size. 



concentric folds are strong and have a steep ventral, and a gentle dorsal slope. 

 The growth-lines are distinct and regular. /. cornujafn.-; and the other species 

 mentioned may be compared with /. lezemiemis, Decocq,' which is of the same 

 type as I. Lamarcki but possesses two radial folds due to the presence of a medial 



sulcus. 



Distribution.— JJ^^ev Chalk, Wouldham Cement Company's Quarry, Grays, 



Essex. 



I Barrois, ' Ann. Soc. geol. ilu Nord," vol. vi (1870), p. 465, pi. 5, figs. 1, 2. 



