1922 



TYPE AMMOXITES—IV 



CCXCVc 



X 0-37 



Nautilus chalcedonicus. Young Cs: Bird, 1S28, Holotype 



Geol. Yorks. 271, 2j2 : " Thornton, Yorkshire ; "CoraUian] Oohte " 



Hard blue-grev hmest. (" Mid. Calc. Grit, Hard blue rock " 



Blake & Hudl., Q.j.G.S. XXXIII, 342, §— , Bed [5]) ; Whitby Mus. 12S0 



CHALCEDOXICERAS CHALCEDOXICUM, Young «i- Bird sp. 

 Condioceratan, I 'crtcbriceras 



