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A NATURALIST IN THE PACIFIC 



CHAP. 



SECOND ORDER OF THE HYPERSTHENE-AUGITE ANDESITES. 



CHARACTERS. Felspar-lathes in flow-arrangement. 



FORMULA. Hypersth-aug., rnatr., flu. 



THIRD ORDER OF THE HYPERSTHENE-AUGITE ANDESITES. 



CHARACTERS. Felspars of the groundmass short and stout 



(orthophyric). 



FORMULA. Hypersth-aug., matr., orth. 



REMARKS. The same classification is to be employed here as in 

 the case of the two previous orders, but as the rocks in my collec- 

 tion that belong to this order are not numerous (nine sections), it 

 will be sufficient to refer to the general remarks on the order 

 on p. 290. 



