icjii AMMONITES BIRDI 24c 



Comparable Species 



Nautilus costatus, Reinecke, 1818, xi, 68. 

 Ammonites hawskerensis, Young & Bird, 1828, xiv, 6. 

 Am. hawskerensis ; Phillips, 1829, ^"i> 8. 

 Am. costatus ; Zieten, 1830, iv, 7. 

 Am. spinatus ; d'Orbigny, 1844, Lii, 

 Amaltheus spinatus ; Wright, 1882, LV ; lvi, i — 5. 

 Ammonites costatus spinatus ; Quenstedt, 1885, XLii, 17, 18. 

 And see No. 22. 



