XXX 
naturalists’ quarterly advertiser. 
EOIiOGWT AW PAIJEOITOIOGY. 
1. AGASSIZ.—Geological Sketches. First Series. By 
Louis Agassiz. With many illustrations, and a fine por¬ 
trait of the author, lGmo. 1 50 
Contents : America the Old World ; The Silurian Beach; 
The Fern Forests of the Carboniferous Period; Mountains 
and their Origin ; The Growth of Continents; The Geolog¬ 
ical Middle Age; The Tertiary Age, and its Characteristic 
Animats; The Formation of Glaciers: Internal Structure 
and Progression of Glaciers; External Appearance of Gla¬ 
ciers. 
2. AGASSIZ.—Geological Sketches. Second Series, 16mo. 
Contents : Glacial Period; The Parallel Roads of Glen 
Roy, in Scotland ; Ice-Period in America ; Glacial Phenom¬ 
ena in Maine; Physical History of the Valley of the Ama¬ 
zon. 
3. AGASSIZ.—A Journey in Brazil. By Prof, and Mrs. 
Louis Agassiz. With 8 full-page illustrations, and many 
smaller ones, from photographs and sketches, 8vo . . 5 00 
4. Geological Survey of Illinois. A. H. Worthen, Di¬ 
rector. Five large vols., imperial 8vo, many plates, maps 
and cuts, bound in full cloth. Printed by Authority of the 
State, 1869-1873. This is a most important and valuable 
work on the Geology and Palaeontology of our Country. 
Price per vol..5 00 
5. BLANFQBD.—Geology and Zoology of Abyssinia. 
8vo.6 50 
6. DAWSON, J. W.—Acadian Geology. 3rd edition. 
With Supplement, royal 8vo.4 75 
7. GUKIE.— Outlines of Field Ornithology. Illustrated, 
16 mo. 1 00 
8. M’COY.—Contribution to Palaeontology. 8vo . . 3 00 
9. COPE.—On the Supposed Carnivora of the Eocene. 10 
10. “ Contribution to the Vertebrate Fauna of 
the Miocene of Oregon.25 
11. “ Second Contribution to the Vertebrate 
Fauna of Oregon.25 
12. “ Descriptions of Extinct Batrachia and 
Reptilia from the Permian Formation of Texas. 25 
On New. Vertebrata from the Upper Ter- 
tiaries of the West. 
13 . 
