Geology. 151 
. The author has left this great department of the survey to future workers. 
This being so, the author had hardly a broad enough basis for the institu- 
tion of a new system of nomenclature and of subdivisions for the Palzo- 
3 ich has had no existence except in the fancy of the 
__ wnter, This unfortunate framework, about which Prof. Rogers has clus- 
_ tered his facts, is no serious impediment to the geological reader who has 
_ akey at hand for comparison. : 
yy he work isa great one, worthy of the state which authorized the 
and will ever rank among the most important of the reports on the 
geology of the United States. A large and beautiful geological map of 
the State accompanies it. 
6. Contributions to the History of Euphotide and Saussurite ; by T. 
Srerry Huwr (this Journal, [2], xxvii, 336-347).—Erratum.—On pa 
345 in the analysis of saussurite vi. the oxygen of 27°72 of alumina is | 
given as 13°95 instead of 12°95, the true number. This correction being 
made, the oxygen ratios for the protoxyds, sesquioxyds and silica become 
7°62 313-73: 23°25, equal to 1: 1°80: 3°05, instead of 1: 1°93: 3°05. 
In this case therefore as well as in analysis vir, there is present a certain 
excess of protoxyds and silica, corresponding nearly to a tersilicate. 
T. 8 
. 8. 
__ 1. Cretaceous of New Jersey—In the note to page 88 of this volume, 
it is intended to say, that the fossil leaves of New Jersey were found in 
_ the lower part or base of the Cretaceous formation in that state, that is, 
: — an extensive range of strata containing acknowledged Cretaceous 
Hs. 
___—~&. - Report of the Exploration of the Country between Lake Superior 
_ and the Red River Settlement, and between the latter place and the Assi- 
_ niboine and Saskatchewan ; by 8. J. Dawson, Esq., C.E. 45 pp. 4to. 
_ Toronto, 1859. Printed by order of the Legislative Assembly.—Besides 
Important information on the aphy of the region referred to, some 
; It is that the Ammonite might 
_ have been carried north by the Indians, but in view of the other facts it 
_ improbable. Another lot of specimens, including Scaphites Nicoletit 
_ and Nautilus DeKayi, received from another person, is said to have been 
_ found in the bed of the Saskatchewan. 
