THE NATURALIST, 1909. 



Plate XIV. 



(^) 



(1) Am. falcifer, Sow, sp. {Harpoceras falciferum). (Nearly natural size ; 

 diameter should be 58-5 m.m.) 



(2) Am. stvangwaysi, Sow, sp. {Harpoceras strangwaysi). (Reduced to 

 about § nat. size). 



From photographs of Sowerby's original type specimens supplied by 

 Dr. A. mith Woodward. 



"Am. mulgravius." (?) (Of collectors). Also wrongly named_^ by 

 many "Am. sevpentinus." 



The adult Harpoceras falciferum of the foregoing paper. From 

 photograph of Yorkshire specimen in Hull Museum, supplied by Mr. 

 Sheppard, (Reduced to about J nat. size). 



