AMAUROCERAS FERRUGINEUM (SIMPSON), AN AMALTHEID FROM 



THE DOMERIAN OF WHITBY. 



Photographs by J. W. Tutcher of the holotype in Whitby Museum, repro- 

 duced from "Type Ammonites," by S. S. Buckman, vol. Hi. (1919). 



a, Side view. (X.) Radial line painted black, b, Peripheral (ipertural) 

 view. (Xi. ) c, Side view. (X2.) Suture-lines strengthened on 

 negative, guide-line in white. d, Side view. (X2.) Intervals 

 between certain sutures painted on print, e, Right half of suture- 

 line, straightened out. (X4.) 



