PLATE XX. 



MicroscojDic textures of the lavas of the Nabé-yama (eastern) 

 field, effluxeci in the recent eruption of 1914, and of the 

 éjecta in the western field in the same eruption. 



Fig. 1. — Hypersthene-andesite ioriiiiuij; the lower portiou of the laud-lava at 

 tJic lava-Jrowued watering-place of Ari-iuura. No olivine Mas detected, 

 l)ut angite is fairlv abundant among ])lieuo('rvsts. See pages 176, 177. 



Fig. 2. — Olivine-hypersthene-andesite from a lava head within the sea near 

 Ari-mura. On account of higli magniti cation, unfitrtunately no pheno- 

 erysts of olivine, hypersthene nor j)lagioclase are seen in the mieroseopic 

 field. See pages 176, LSI, 182, 183. 



Fig. o. — Olivine-hypersthene-andesite of sul^marine origin like the preceding, 

 forming an islet oft' shore of Ari-jniira. See pages 176, 177, 181, 182, 

 183. 



Fig. 4. — Olivine-hypersthene-andesite from the lava-front at the Avater's edge 

 at the defunct strait of Seto. See pages 176, 177, 181, 183. 



(Figs. 1-4 are the pliotomicrographs of lavas ot the eastern (Nabé-yama) lava-fiekl.) 



Fig. 5. — A secretionary patch in the gray hornblende-andesite of Fiiruhata, a 

 voleanello adventive to the North Cone. It occurs scattered abont in 

 Akobara as éjecta or pseudobombs, having spindle-shape due to subaërial 

 abrasion. It sliows the strucfHir encherêfrêc See page 213,. 



Fig. 6.- — White scum from the western coast with pores greater than 0.0'^ inm. 

 in diameter. See pages 118, 18Î», 202. 



Fig. 7. — Gray scum from the same region as the preceding with i>ores less 

 tlian 0.03) v//v/i. in diameter. See pages 118^ 189, 190. 



Fig. 8. — Microtinite éjecta on the western lava-field coated black witli lava 

 films. It is built up of clear anorthite polygons cemented with grayish 

 ])at(lies of (?) ortlioelase full of air pores. See pages 190, ]î)l. 



