286 ODLIXG : CORRELATION OF THE UPPER AND MIDDLE OOLITES 
two species of ammonites were obtained ; these were sent to Mr. 
S. S. Buckman, who wrote — 
" Roughly speaking your Amm. show a Macrocephalites indicat- 
ing top of the Cornbrash {macrocephahis zone, base of the Callovian) 
and something of Zuendstedoceras style, indicating Callovian, I 
should expect not later than ornatum zone — which is called Kellaways 
rock in Yorkshire."] 
Ferruginous sandstone with many Gryphaeas, including G. bilobata 
and forms resembling G. dUatata, about 1 foot. 
The fossil evidence therefore is very unsatisfactory, although 
according to the Geological Survey, there is about 40 feet of Kellaways 
below this, in one bed of rock two ammonites are found less than three 
feet apart, on point ng to the top of the Cornbrash or base of the 
Kellswaya, the other to about the lower part of the middle Oxford 
Clay of the south of England ; below this come Gryphaeas shewing 
affinities both to the Oxford Clay and also to the Kellaways, and at 
the top Pectens of species which occur in the Kellaways, below the 
Oxford Clay at Scarborough. 
Of the ammonites mentioned by Fox-Strangways from the Kella- 
ways marking higher beds in the Oxford Clay, and even in the Corallian, 
not traces could be found. Much careful collecting, therefore, remains 
to be done before the true relations of the series exhibited at Roiilston 
Scar to the section provde at Oswaldkirk can be made out. 
The topmost bed of the Kellaways contaniing rolled Belemnites 
may have been deposited contemporaneously with the clay of Oswald- 
kirk, Roulston Scar being at this period an area of non-deposition, 
or even of contemporaneous erosion, the only forms representing this 
period capable of withstanding the scouring without being entirely 
comminuted being the Belemnites. Against this, how^ever, must be 
taken the fact that the Kellaways does not exhibit the characteristics 
of a shallow water deposit, false bedding, for instance, being apparently 
absent. 
