Voie mo ( tshima, Idzu. 67 



Special Descriptions. 



Special descriptions of the rocks of Osliima will be given 

 4)e]ow in the following order : — 



(A) Lavas of the 8(3inuia. 



1) Basaltic bandaite almost free ivom pheuocrysts of m;ific 

 minerals. 



2) Hj'persthene-basaltic bandaite. 

 8) Two-pyi"oxene-basaltic ])andaite. 



4) Hyperstliene-bearing angite-olivine-bytownite-basalt. 



(B) Lavas of the Central Cone. 



5) Miharaite. 



(C) Piocks constituting; the Demolished Igneous Bodies along the 

 Western Half of the Xorthei'u Coast. 



() ) Two-p}Toxene-olivine-anorthite-l)asalt. 



7) Olivine-bytownite-basalt («). 



8) 01ivine-l)ytownite-dolerite. 



9) Olivine-bytownite-basalt (ß . 



•(D) Kocks occurring as Dykes. 



10) Olivineless-basaltic bandaite (a). 



11) Olivineless-basaltic bandaite (ß). 



(K) Ejecta. 



12) Ashes, Sands, Lapilli, and Bombs. 

 18) Micro-allivalite. 



14) Angite-micro-diovite. 



(A) Lavas of the Somma, 



1) Basaltic bandaite almost free from plienocrysts of mafic 

 minerals. (The first typa of the somma lava.) (PL I. Figs. 1-1». ) 



This type contains the lavas of more or less wide latitude. 

 'The characteristic feature which distinguishes this from the others 



