1920 



T YPE A MMONI IES—III 



CXLVIII 



Fig. i 



big. 2 



Ammonites placenta, Simpson-Leckenby 1859, Holotype 

 Q.J.G.S. XV, ro ; 11, 1 ; " The Castle Rock, Scarborough, Yorks ; 

 Kclloway Rock " ; Grey, coarse ool. ; Sedgwick Mus., Cambridge 

 (Leckenby Coll.) ; S. 58, 52, 34 ? 19. See CXXIa 



LONG^VICKRAS PLACENTA, Simpson-Leckenby sp. 

 Callovian, duncani 



