PLATE XIX. 



Microscopic textures of lavas of the An-ei eruption of 1779- 

 1781, and the recent eruption of 1914. 



JP'ig. ]. — Hypersthene-andesite of the xVu-ci eruption at the water's edtçe at 

 Cajie llirabaiia on the nortlieastern shore. See ])age.s 172, 175. 



^^ig- ~- — Hypersthene-andesite from Iwo-jima, one of the new islets that rose 

 froiii the sea during the An-ei activity. See pages 172, 176. 



Fig. o. — Hypersthene-andesite of the recent eruption (11)14), taken from 

 the lower portion of the la va- front of the western lava-field at Akobara. 

 See pages 176, 177, 178, 179. 



Fig. 4. — Hypersthene-andesite from the same lava-field on its southern margin 

 at Akaiiii/.u. See pages 176, 177, 178, 179. 



Fig. 5. — Hypersthene-vitroandesite with the damascened brown glassy ground- 

 mass, ejected from a western vent, fell and made hollows in the ground 

 at Alvôbara. The ejected block represents the hyaline type of lava, it 

 encloses angular enclaves of whitish ceramicite, and makes veinlets in it. 

 See pages 176, 179, 186. 



Fig. (). — Olivine-bearing hypersthene-andesite brought out from the bottom at 

 30 tkthoms at tJie lava-front on tJic Yokovama side. The olivine is not 

 seen in the figure. See pages 176, 177, 181, 182. 



Fig. 7. — TJie same as the preceding, from the bottom at 10 fathoms on the 

 Akamizu side. A resorption-rest of olivine is st;en in the figure. See 

 pages 176, 177, 178, 181, 182, 183. 



(Figs. 3-7 are the photomicrographs of lavas from the western (front) lava-field.) 



Fig. 8.^ — Hypersthene-andesite at Yuno-hama in tlie eastern lava-field. See 

 piges 176, 177, 178. 



