Wadsworth.] 
256 
[October 19, 
The Toyabe range granite was described by Emmons in Yol. 
Ill (p. 323) as Jurassic, and evidence that appears to be sound 
given in support of the view, but in Yol. I (pp. 75-77) it is 
referred by King to the Azoic, without giving any evidence 
therefor or mentioning the former view. 
In 1877 the Pavenswood Peak granite was regarded as post- 
Azoic, and from the evidence given it was probably eruptive 
since the Carboniferous (II, pp. 637-639). However, in 1878 King 
states “ there is little doubt of its Archaean age, but its reference 
to that period is only on general lithological grounds ” (I, pp. 78, 
108). 
A granite dike in the Havallah range is regarded by King as 
an exceptional occurrence in his district, but the writer thinks 
that the difficulty can easily be explained (I, p. 81 ; II, p. 675 ; 
YI, p. 46, No. 77, Col. No. 1488). Previously to the publication 
of Mr. King’s report, the writer satisfied himself that the section 
(1488) described by Zirkel never came from the hand specimen 
(1488), a not uncommon mistake, apparently, in Zirkel’s work on 
this collection. 
The Pali-Ute granite, Professor Zirkel stated in the manuscript 
report, was doubtless envptive, but in the published report (Yol. 
YI, p. 44) he was made to say that it “ doubtless belongs to the 
metamorphic group.” 
The younger eruptive granite of the Pah-tson was regarded 
by Zirkel as Jurassic (YI, p. 43), by Emmons and Hague as prob- 
ably Jurassic (II, p. 778), but by King as Azoic (Archaean), (I, 
p. 92). This change of views between 1877 and 1878 as usual is 
not noticed in Yol. I, and no proof is advanced in behalf of the 
latter view. This is the case with the Pah-supp granite, and with 
but few exceptions, so with all the granite westward to the Sierra 
Nevada: Jurassic of Zirkel, Emmons, and Hague, but Archaean 
of King who tells us Zirkel’s “ microscopic examinations every 
way confirm the field arrangement.” 
Syenite. 
Mr. Merrill does not take up the question of the syenites; 
although, since there were but two specimens, he had the informa- 
