1927 



TYPE AMMONITES— VI 



DCCVII 



Dactylioceras commune 



Whitby, Yorkshire ; Upper Lias, [Alum Shale] ; S.B. Coll. 4713, purch. 



S. 44, 26-5, 28, 47-5 ; 64-5, 2475, 2475, 55 ; max. c. 70 



See T.A. vi, Feb., 1927, p. 43 



KOINODACTYLITES COMMUNIS, J. Sowerby sp., 1815 

 Hildoceratan, bifrons ; Genotype. Cf. DCC 



