Reference to the Geological Survey map, Sheet 44, will show the exact position of the quarry: to the south of the junction of the road from Condicote to Scarborough with that leaving the main road opposite the lane which comes past Rook Pool Barn (now Kinetonhill Farm) and Rook Pool. The area in which the quarry is situated is thus indicated as being composed of Inferior Oolite rocks. The fauna contained in Bed 2, and especially the Rhynchonella and Terebratula, clearly shows that this is an error. I am indebted to Mr. W. H. Hudleston, F.R.S., for kindly examining the Gasteropods. Their state of preservation only allowed of their being identified approximately, but, as Mr. Hudleston observed, “they certainly wear a Bathonian facies rather than that associated with the Inferior Oolite.” Mr. R. F. Tomes, F.G.S., kindly determined the corals. The specimen of Trigonia obtained agrees with that figured by Lycett in his “Monograph of the British Fossil Trigoniœ,” pl. xxxiv, fig. 9, as T. pullus; but not with the T. pullus of Sowerby.