1910 



AMMONITES RUDIS 



14c 



Comparable Species 



Am. malagma, Dumortier, 1874, xxii, i — some slight differences. 



Am. robustus, Denckmann, 1887, vii, i. 



Denckmannia? malagma; S. Buckman, 1898, iv, i, — exact agree- 

 ment in proportions, almost exact in ornament. 



D. tumefacta, Id., i, 7-10, — is much more regular in its style of 

 ornament, has a smaller umbilicus and stouter whorls. 



