EXPLANATION OF THE PLATES. 



IX 



Platrs 



Pa«e 



(^Fossils from the Andes (Callao-Perene Sec-^ 

 tion) ; View of the Upper Part of the Moro- 

 cociiA Valley, showing thw Anticona Lacco- 

 LiTE AND Lake Huacracocha; Upper Part 

 XV-XX-^ of THE Anticona Laccolite, showing Dacitf y 246 

 capped by Cretaceous Limestone ; and Gteo- 

 logical Section through the Andes from 

 Callao to the Perene Eia:er, illustrating 



1^ Mr. J. A. J)ouglas's paper on that section ) 



Plate 



( NUM3IUL0SPER3IU3I BOWENENSE, gen. et Sp. HOV., 



XXI { and Scale-Leaves oi' Glossopteris, illustrat- [ 289 

 ing Dr. A. B. Walkom's paper on those fossils. 



iLiAssic GrAsTROPODs, illustrating the paper by ~ 

 Miss A. I. McDonald & Dr. A. E. Trueinan 

 on the Evolution of those Organisms, with 

 special reference to their Use in Stratigraphy, j 



297 



Dates of Issue of the Quarterly Journal for 1921. 



No. 305— May 13tb^ 1921. 

 No. 306— August 19th, 1921. 

 No. 307— November lltb, 1921. 

 No. 308— December 31st, 1921. 



