~ 
Geology and Mineralogy. 153 
The 
ing the horizon of these beds is aie paleon- 
loge and this, as it at present stands, shows that their fauna, 
subject, it seems to me an obvious over-reaching of facts to refer 
the beds in question unqualifiedly to the Champlain division of 
ork System. 
New York, December 12th, 1879. 
3. List of Papers on the Taconie System ; by James D, Dana. 
—As a ee to my last ed oe n the Taconic et he pub- 
2 i aa ghee OF ITS ase geen POSITION AND UNCOMFORMABILITY TO THE NEW 
ORK 
1 
Emmons for a while lived) and other slates to the north, and west to udson, 
also th and semicrystalline limestones and quartzyte.— 
M: Re ri Ww , Part v, 4to, 1846, pp. 12; describes the sys- 
Michigan.—Ipem: America n Geologist, 8vo, volume i, 1855, Part ii, pp. 1-124; 
extends the a gs from Maine to o Georgia, divides it ‘hate Upper and Lower, the 
heir 
slates, limestones, and magnesian cmp of the original Taconic, with 
sed equivalents, being made the r, and some added fossiliferous rocks 
[Primordial and later], with their su Hhecer Sat relns the Upper.—Ipem: Re 
on the North Caroli na Fal Survey, es 185 9-72. 
E.& & C. H. Hrrcucook:; Report on Pee ogy oy Vermont, 2 vols., 4to, 1861; 
Sustains the system, but half Lehi tt by the Cg enchgaes Sess facts it reports.— 
COU, Comptes Rendus, Noy. 4, 1861, an oc. Boston . Nat. Hist., 
ARi 
1862 ; adds the Potsdam sandstone and the pie of the Green Mountains to the 
aconic system. 
the o 
of brown hematite ore” "for lt crest ma oy aa magnesian limes en fc 
: DEM: 
Part i, 1878; uses pty e Taconian fs 207), with the sa mn, but 
Makes the Upper Tactile ee. include th the Quebee pees anat op, _ 1 208) 
°rganic remains of the European Cambrian at least as low as the 
Am. Jour: Scr.—Turep Suures, Vou, XIX, No. heater 1880 
1 
