248 



A NATURALIST IN THE PACIFIC 



CHAP. 



Second Order of the Hypersthene-Augite Andesites. 



Characters. — Felspar-lathes in flow-arrangement. 



Formula. — Hyperstk.-aug., matr., 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. 



