Quart. Journ. Geol. Soc. Vol. LXVIII, Pl. VII. 



Fig. I. 



SPILITE (PILLOW-LAVA), SHOWING THE CONCENTRIC ARRANGEMENT 

 OF THE VESICLES IN REGARD TO THE MARGIN OF THE PILLOWS. 



S.H Reynolds, Photo 



Fi6. 2. 

 CHERT, ASSOCIATED WITH SPILITE,IN THE FORM OF IRREGULAR STRINGS AND PATCHES. 



S.H. Reynolds, Photo. 



Bemrose H^, Collo., Derby 



