Vol. Im-VU. NOVEMBER 2iid, 1901. No. 228. 

 Pabt 4. 



THE 



QUARTERLY JOURNAL 



OF THE 



GEOLOGICAL SOCIETY. 



EDITED BT 



THE ASSISTANT-SECRETARY. 



[With One Plate, illustrating a Paper by Prof. J. W. Spencer.] i 



LONDON I 

 LONGMANS, GREEN, AND CO. 



PARIS:— CHAELEB KLINCKBIECK, 11 RUB DE LILLE. 

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