1921 



TYPE AMMONITES— III 



CCII 



Fig. I a X 2 



Fig. I 



" ' Perisphinctes ' davidsoni " ; S. Buckman 1895 



O.J.G.S., XLIX, 500, § xv, 4 ; " Frogden Quarry, Oborne, Dorset 



" Inf. Ool. ; Niortensis ; " body-ch. with aperture ; S. B. Coll. 3390 



S. 50, 25, 25, 50 ; 120, 25, 17, 54 ; c. 52 ribs penult, whorl 



LEPTOSPHINCTES CORONARIUS. nov. 

 Bajocian, niortensis ; Holotype 



