262 T. S. Hunt on Lithology. 
hornblende, and some quartz. The norite from Sweden is 4 
anular mixture of a similar kind, containing also mica; an 
the ophite of some writers is a diorite in which hornblende 
greatly predominates. 
The rocks which are essentially composed of anorthie feldspar 
‘ven to those 
varieties of diabase which contain hypersthene or diallage 
These rocks occur abundantly in the Labrador series, where the 
hypersthene in them sometimes takes the form of a green ae 
; iated 
to which epidote is said to occur in the hyperites of the same Se 
w YO 
the hyperites of Sweden, and of the Island of Skye. 
ersthene 
The hyperites, although indigenous rocks in the Labrador pai 
in Canada, are described as forming in other regions jntrusl 
masses, eas" : 
Those varieties of diabase or hyperite which contain diallag® 
have, by the Italian lithologists been called gramiton® "| 
Rose and others have been described under the name of gann™ 
his rock sometimes contains hornblende, mica, and an ee 
Se 
but by 
