1893.] T. H. Holland — Slab of Chinese Agglomerate Lava. 167 



as the Sinian system of elevation. * Elsewhere I may have occasion to 

 refer to these features in greater detail : for the present I have referred 

 to them for the purpose of showing that, whilst I think the slab found 

 in St. John's Churchyard is undoubtedly of Chinese origin, it may have 

 been brought from any of the localities in East China and Korea where 

 these characteristic, acid, igneous rocks prevail. In what manner the 

 slab was brought to India will doubtless appear from Mr. Hyde's re- 

 searches. 



EXPLANATION OF PLATE. 



Figs. 1 & 2. From slab of Chinese agglomerate lava found in St. John's Church- 

 yard. 



Fig. 1. Bi-pyramidal crystal of quartz corroded by the magma. 



Fig. 2. Crystal cracked and corroded. 



Figs. 3 & 4. From eurite. Victoria Peak, Hong Kong. 



Fig. 3. Bi-pyramidal crystal of quartz corroded by the magma. 



Fig. 4. Crystal cracked and corroded. 



* Geological Ke3earches in China, Mongolia, and Japan, 1866, p. 67. 



