PLATE II. (Microphotographs) 



Fig. 1. — Hyperstliene -basaltic bandaite (the 2ud type of tlie somma lava, 



PL VI. BC 2). X 70. See p. 73. p . , . . calcic bytownite, 



// ... liypersthene. 

 Fig. 2. — Two-pyi'oxene-basaltic bandaite (the 3rd type of the somma lava), 



from the lowest lava layer of the three on the sea cliiï at Gyoja 



(PL YI. FG 6). x70. See p. 74. /i . . . . hypersthene. 

 Fig. 3. — The rock of the same type as in Fig. 2, from the uppermost lava 



layer of the three on the sea cliff at Gyoja (PL VI. FG 6). x 70. See 



p. 74. j) . . . .calcic bytownite, a . . . .angite. 

 Fig. 4. — Hyperstheue-bearing augite-olivine-bytownite-basalt (the 4th type 



of the somma, lava, PL VI. EF 5). x 70. See p. 76. p.... calcic 



bytownite, o . . , . olivine. 



Lavas of the Central Cone (Miharaite). 



Fig. 5. — An older lava collected from the lowest exposed layer on the eastern 

 crater- wall, x 70. See p. 79. p. . . . calcic bytownite. 



Fig. C. — Lava of 1778 (Au-ei era), collected from the lava field on the 

 northern flank of the central cone, x 70. See p. 80. -p . . . . calcic 

 bytownite, /<.... hyperstheue, a. . . .angite. 



