277 
RECENT GEOLOGICAL DISCOVERIES AT SPEETON. 
T. SHEPPARD, F.G.S. 
Perisphinctes lacertosus.—The specimen herewith figured 
is a large and unusually perfect example of Perzsphinctes 
lacertosus Dum et Font, one of the characteristic Ammonites 
of the lower beds of the Upper Kimeridge in Filey Bay. These 
beds have very rarely been seen, but recent exposures of them 
above Reighton and Hunmanby Gaps showed that they contain 
Perisphinctes lacertosus from the Kimeridge Clay, Speeton. 
myriads of ammonites, so crushed, however, that only in the 
nodules can the collector hope to get even a fragment well 
preserved. The present specimen sent by Mr. C. G. Danford 
to the Hull Museum may therefore be regarded as an ex- 
ceptionally fortunate find. It measures 12} in. across, is jn 
some places slightly crushed, and the last two whorls have 
been partially squeezed asunder; otherwise the form is well 
1g07 August 1. 
