^{page 175 note 1} Quart. Journ. Geol. Soc. vol. xxiv. p. 218.

^{page 175 note 2} I think it doubtful whether this was really obtained from the shelly sands, but had not rather been washed on to their surface from the overlying Boulder-clay; for it is hardly likely that a fragment of so strong a shell as C. islandica should be found, when such comparatively delicate shells as Scrobicularia piperata have been deposited unbroken; for though these shells are now almost always found so crushed as to make it difficult to recognize them, this has been done after they were buried, for the fragments always remain together and are in no wise rolled. Most careful search, also, has failed to reveal to me another particle, whereas worn fragments of this shell are rather abundant in the clay above, which is constantly washing down and masking the sand bed. As Prof. Phillips considered the bed of Drift-age, he would not consider this of much import.

^{page 176 note 1} This was probably really the chalky gravel presently to be described as capping the bed, with a masking of Boulder-clay.

^{page 176 note 2} I found them to be 14 feet.

^{page 176 note 3} A source of much trouble in collecting from the drifts on the coast; for the seabirds carry molluscs into the cliffs to break and eat, and the fragments get washed into the clays and gravels

^{page 176 note 4} Any one looking for this bed might find it difficult to hit upon, owing to the before-mentioned masking by Boulder-clay washed from above, so that it exactly resembles Boulder-clay itself. Until its position was pointed out to me by F. A. Bed well, Esq., of this town, who had re-discovered it, I was unable to find it from this reason.

^{page 178 note 1} I have to thank Dr. Gwyn Jeffreys for his kindness in examining these shells for me.

^{page 179 note 1} Proc. Yorkshire Geol. Soc. for 1879 (On the Divisions of the Glacial Beds in Filey Bay).

^{page 179 note 2} Quart. Joum. Geol. Soc. vol. xxiv. p. 147.

^{page 179 note 3} V. supra.