wilmore : thornton, marton and broughton-in-craven. 365 
Gasteroi'Ods : — 
Flemingia spiralis (De Koninck). 
Capuliis irilobus (PhilL), and others not yet determined. 
It will be seen that the faunal assemblage is very similar 
to that of the Thornton beds, and I can further say that it is 
quantitatively very similar, those forms which are common 
in the one being common in the other. These beds thus seem 
to belong to the same upper Dibunophyllum zone, and I should 
propose to consider them as the same sab-zone. The beds 
strike in the same general direction as those of the Thornton 
anticline, and seem to form the southern limb of a syncline 
which is apparent at the western end, south of Gledstone Hall, 
but is buried under drift in the district of Bank Newton. 
The beds at Gledstone Kennels may thus be included in 
this series — see map (23). They represent the northern limb 
of the syncline. The fossils are absolutely the same as those 
of Marton School. 
The Marton-Stainton Series of Exposures. 
The general orientation of these beds was described in my 
preliminary paper, " The Structure of Some Craven Limestones,"* 
The beds are of the same general type as those of tlie two 
series already described. The lowest beds are those of Skelda 
Wood Quarry (24), the highest those in tlie fields near 
Stainton House (27) and (28). These are dark massive lime- 
stones with frec^uent shale partings, and in these shales fossils 
(often much crushed) are obtained. Slickensiding is again very 
common, and chert is abundant, especially in the upper beds. 
In Marton Scar and Stainton House Quarries there are the 
same thin bands of black chert that have been noted at East 
Marton. There are also the same irregular masses. One piece 
of chert had an almost square section, the plane of the section 
coinciding with the bedding plane of the rock. Some masses 
are irregularly lenticular, while others have somewhat rounded 
terminations. A sketch of a piece of limestone, about 18 inches 
by 9 inches, enclosing bands of chert, is given in Fig. 4. 
Proc. Yorks. Geol. Soc, Vol. XVI., Part I., p. 27. 
II 
