1858.] LECKENBY KELLOWAT FOSSILS, YORKSHIRE. 15 



DESCRIPTION OP PLATES I., II., IIL 



Illustrating some Fossils of the Kelloway Mock of Yorkshire. 



Plate I. 



Fig. la. Ammonites Growerianus, Sow. ; nat. size. (A portion entire.) 



\h. ■ . At a more advanced period of growth ; nat. size. 



\c. . Shape of the aperture. 



\d. . Suture. 



2. Am. reversus, Leckenhy {Simpson, MS.) ; nat. size. 

 3a. Am. Vertumnus, Leckenhy {Bean, MS.) ; nat. size. 



35. . Outline of front view. 



4«. Am. poculum, Leckenhy {Bean, MS.) ; nat. size. (A portion entire.) 



4h. . Older and thicker form ; nat. size. 



4ec. . Suture. 



Plate II. 



Pig. 1. Ammonites placenta, Leckenhy {Bean, MS.); nat. size. 

 2a. Am. alligatus, Leckenhy {Bean, MS.) ; nat. size. 

 2h. .. 



3a. Am. putealis, Leckenhy {Bean, MS.) ; nat. size. 



36. . Form of the aperture. In the specimen here figured, the 



siphuncle is not symmetrically placed, the dorsal lobe being on the 



left of the keel. 



3c. . Suture. 



4a. Am. hyperbolicus, Leckenhy {Simpson, MS.), side view; half nat. size. 



4th. '• . Front view, showing aperture. 



6a. Am. glabellus, Leckenhy {Bean, MS.). 



5h. . Shape of the aperture. 



5c. . Suture. 



Plate III. 



Fig. la. Pleurotomaria arenosa, Leckenhy {Bean, MS.) ; nat. size. 



\h. . Enlarged view of part of a suture and ornament. 



2a. PI. striata, Leckenhy {Bean, MS.). Upper view of spire. 



2h. . Side view. 



3a. PateUa? graphica, Leckenhy {Bean, MS.) ; nat. size. Upper view. 

 3h. . Side view. 



4. Cucuilaea clathrata, Leckenhy ; two thirds of nat. size. 



5. Cucuilaea minima, Leckenhy ; nat. size. 



6. Anatina versicostata, Buvignier; nat. size. 



7. Solemya Woodwardiana, Leckenhy ; nat. size. 



8a. Cardium cognatum, Fhillips ; nat. size. View of left valve. 



85. . View of the hinge-area. 



9a. Cardium Crawfordii, Leckenhy ; nat. size. 



95. . View of the hinge-area. 



10a. Isocardia? clarissima, Leckenhy {Bean, MS.); nat. size. 

 105. . View of the hinge-area. 



11. Unicardium sulcatum, Leckenhy {Bean, MS.); nat. size. 



12. Cerithium abbreviatum, Leckenhy ; enlarged. 



13. Cerithium Culleni, Leckenhy; enlarged. 



14. Chemnitzia lineata, Leckenhy ; enlarged. 



Ammonites Goweeiantjs (p. 9). Localities. Red Cliif and tlie 

 south side of Scarborough Castle Rock. 



Ammonites hyperbolicus (p. 12). Locality. Red Cliif. 



