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. Buchman, vol. Hi, (1919). 



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

 view. (X3-) 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-) 



