I 



1911 AMMONITES ACUTICARINATUS 40c 



Comparable Species 



Am. scmicoslatus. Young & Bird, 1828, xii, 10. 



Am. kridion ; d'Orbigny, 1844, li, 1-6, type of 

 Am. hartmanni, Oppel, 1856, p. 79, and 

 Arnioceras kridi/orme, Hyatt, 1867, p. 74. 



Arnioceras cuneiforme, Hyatt, 1867, p. 73 ; 1889, 11, 



A. incipiens, Id., p. 74. 



Arietites semicostaius ; Blake, 1876, vi, 4[a]. 



Arnioceras hartmanni ; Hyatt, 1889, 11, 17. 



