1910 



AMMONITES IGNOTUS 



arc 



Comparable Species 



Am. jamesoni ; Quenstedt, 1884, xxxi, 6-8. 



Am. jamesoni costosus. Id., xxxi, 12. 



Am. jamesoni ; Haug, 1887, v, i ; and suture line, p. 125, fig. 4 : 

 portions of EL and L' visible on the specimen appear similar, but 

 less developed. 



And see A. ripleyi, No. 2c. 



