CEPHALOPODA Ammonites vertebralis 
Sowerby, 1818. 
1818. — SoweErBy (James). The Mineral Conchology of Great Britain, 
Vol MD 147 Pl CIEXVE 
Type specimen (holotype). 
[Buckland’'s Collection, at the University Museum, Oxford]. 
H. — Ammonites vertebralis, side view, nat. size. 
H.2 — Section across line AB, nat. size. 
H.b — Suture line of the same. 
PALAEONTOLOGIA UNIVERSALIS. — 93% 
