Mineralogy and Geology. 409 
best authority in our country. There are some debatable points as to the 
distribution of the formations ; as the limits of the Huronian, and of the 
Subcarboniferous ; but such there must be as lo ong as science is makin 
progress. The other maps and the sections are also admirable in style 
cter. 
States; by F. B. Maex and A. H. Worrnen. 20 pp. 8vo, (from the Proc 
aper contains Porson en of thirty-six new species of Mollusks, and 
of a six of Trilobites, including one of Dalmania (Upper Silurian), one of 
Lichas, (Lower Sil.), one Proetus (Subcarbonif.), and three of Phillipsia 
(Subearboniferous). 
Observations on the Microscopic Mell. structure wre — — 
Sowerby, and some similar vF. BM 8 pp. 8 
(From Proe. Nat. Sci. Philad., 1865, 275 Ji Meek nan in this vi 
eration o Fossils collected i in the i ‘Limestone at Chi- 
cago, “Iitinois, “with descriptions of several new species ; by Prof. A. Win- 
isc Aotioms sob ESSEN sete No.7. 46 pp. 4 
wih 3 amen Frankfort, 1866. (Christian Winter). bi Pa 
easurements and figures of Calcite from Iceland, Hessenbergite, Carnal- 
lite, Biotite from Vesuvius, Clinochlore of Zillerthal, Sphene, Titanite, To- 
"paz, Gold, with an index to the seven memoirs which have been published. 
13. The Geology of Tennessee; by J. M. Sarrorp, A.M. Part I. Phys- 
ical Geography. 124 pp. 8vo. Nashville, Tennessee, 1861.—Professor 
Safford poate the publication of his work on the Geology of Ten- 
nessee in 1861, but was compelled to suspend it by the war, after printing 
this intodutor chapter, which only just now has been issued. It treats 
UR. Sc1.—Sseconp Series, Vou. XLI, No. 123,—May, 1866. 
52 
