212 
BUCKMAN : UPPER TOARCIAN BEDS. 
that they really do not occupy the same beds when strata are 
thick : that they are not truly contemporaries. 
The following is the full Ammonite sequence that has been 
noted in the Cotteswolds and South England^ : — 
Dumortieria 
Hamniatoceras insigne, etc. 
F. dispansurn 
Pseudogr. struckmanni 
Haugia eseri 
Grammoceras striatulum. 
The Yorkshire strata if carefully examined may prove this 
sequence, which is more elaborate than that of the Cotteswolds 
alone : they may add to it. 
r >ep r.uckman ami Wilson, Duiidry Hill. (Jiiait. Juurn. (leol. Soc, Vol. LII.(1896). u. 688. 
note 2. 
