igii 



AMMONITES ARCTUS 



\6c 



Comparable Species 



Am. lavigatus, J. de C. Sowerby, 1827, dlxx, 3. 



Am. dennyi, Simpson, 1843, pp. 9, 10 (Y.T.A. 7). 



Am. davidsoni ; Dumortier, 1867, (II) xxi, i — 4. 



Am. berardi. Id. xxi, 5 — 7. 



Am. obesus, Reynte, 1879, xxvi, 10, 11. 



Am. Uevigatus ; Id., XLiii, 10, 11. 



Am. globosus /3 ; Quenstedt, 1884, xxii, 47. 



And see No. 7. 



