PLATE XV. 



TJie south western coiitinnatioii of the view of the Yuuo-Jiira venthole, 

 shown in Plate XIV. No. 1 veuthole on tlie -western temieod slope of 

 Hikino-hira (marked No. 1) was active at the very first phase of the eru;[)- 

 tion pouring down lava-streams to the west, its crater- wall 1)eing of preexist- 

 ing; Hikino-liira rock. A vent in a Jiigher position, marked with a cross, is 

 a mere blow-hole. 



The lava in the foreground crawled down the \vestern sloj^xi seawards froui 

 No. 2, the Yuno-hira crater. The ragged mass in the foreground is the ' welded 

 flow-breccia,' i.e., the lava l)efore complete consolidation Avas partially plast.i(! 

 igneous magma shattered by rapid movement and cemented by tlie sauie 

 magma. Photo l)y the writer in April, 1914. See pages 139, 140, 147, 14S. 



