64 



J. 8. GARDNER ON THE CRETACEOUS DENTALIID^!. 





Lower 



Green - 



sand. 



Gault, 



Upper 

 Green- 

 sand. 



Chalk. 



DeNTALIIDjE. 



Dentalium. 

 A. Longitudinally ribbed species. 

 D. decussation, Sby., partially ribbed. 



D. medium, Sby., wholly ribbed 



D. divisiense, sp. no v., ribbed, very 

 slender 



i 



... 



* 



# 

 I 



* 



I 

 I 



I 



* 



D. alatum, sp. nov., laterally keeled. . . 



[D. septangulare, Fleming, with only 



7 ribs] 



D. majus, Gardn 



B. Without ribs. 

 D. cylindricum, Sby., rough and ir- 

 regular 



D. Jeffreysi, sp. nov., annulated 



D. acuminatum, sp. nov., acicular . . . 

 [D. cselatulum, Baily, finely reticu- 

 lated] 



Entalis. 

 E. Meyeri, sp. nov 



SlPHODENTALIUM. 



S. affine, sp. nov 



S. curvum, sp. nov 



Cadulus. 

 C. gaultinus, sp. nov 





# abundant. 



I, unique or very rare. 



EXPLANATION OF PLATE III. 



# From the British Museum, t From Jermyn-Street Museum. J From Mr. 

 Meyer's Collection. ** From the Woodwardian Museum. The remain- 

 ing specimens are in my cabinet. 



Dentalium decussatum, natural size. Folkestone. 



„ „ ornament, enlarged, from near apex. Folke- 



stone. 



„ „ ornament, enlarged, from nearer aperture. 



Folkestone. 



„ „ natural size. Folkestone. 



„ ,, cast, natural size. Folkestone. 



„ ,, (D. striatum, Sby.), nat. size. Sussex. 



„ „ nat. size. Folkestone. 



„ ,, (D. ellipticum, Sby.), nat. size. Folkestone. 



,, ,, cast, nat. size. Folkestone. 



„ „ transverse section, near apex, nat. size. Folke- 



stone. 



„ „ transverse section, near aperture, nat. size. 



Folkestone. 



Figs. 1,2. 

 Fig. 2 a. 



Fig. 2 b. 



Figs. 3, 4. 

 Fig. 5. 

 Fig. 6. * 

 Fig. 7. 

 Figs. 8, 9. 

 Fig. 10. 

 Fig. 11. 



Fig. 12. 



