1921 



TYPE AMMONITES— 111 



CCLVI a 



X o 23 



Ammonites GIGANTEUS, J. Sowekby, 1816, Chorotype 



(Min. Conch. II, 55 ; cxxvi) ; Barrel Hill, Long Crendon, Bucks 



Portl. Stone [Lime Bed] ; S.B. Coll. 2957, pres. H. Dodwell, J. P. 



S. 507, 27-5, 29, 53 ; 60 ribs ; max. c. 540 



GIGANTITES GIGAXTEUS, J. Sowerby sp. 

 Portlandian, Gigantilcs ; Genotype. Cf. CCXXXI 



