Ueol. Mag. IWi). 



Plate IV 



Series Xo. 2 



Series Xo. 1. 



Sei'ies 1. — Six wind-cut pebbles from Permian of Quarry "Wood Elo-in, 



Moray. 



Series 2.--Four wind-cut pebbles from Xorth Island, Xew Zealand, for 



comparison with the Elgin series. 



