1909 AMMONITES RESUPINATVS 6c 



Comparable Species 



Am. satizeanus, d'Orbigny, 1844, xcv, 4, 5. 



Am. halecis, J. Buckman, 1844, xi, 9 ; refig. Pal. U., 1904, 26. 

 Am. spinaries, Quenstedt, 1856, Jura, vii, 4, and 1883, xi, 8 — 14. 

 .4»j. riparius, Oppel, 1862, XL, 2. 



Arietites sauzeanus ; Wright, 1878, PI. viii, spp. varr. ; i, 2 has 

 resupinate ribs, but appears to be too stout. 



