Geology and Mineralogy. 297 
useful work, includes a table of specific heats for solids and 
liquids; Part III, tables of expansion by heat for solids and 
liquids; and the Supplement to Part I, specific gravities, boiling 
points, and melting points. 
IL GEoLOGY AND MINERALOGY. 
of New Mexico,t 1874, may be more fully stated as follows: 
Crepe found in the Wahsatch beds not yet reported from 
the Bridger be Aves, genus Diatryma (allied to Gastornis) ; 
ecie mn. 
(2) Divisions found in the Bridger beds not yet found in the 
Wahsatch ; fishes, Amiide ; reptiles, Ophidia ; Anostira ; mam- 
mals, Mesonychiide ; Tillodontia ; Achwnodon ; Dinocerata ; Pa- 
osyops ; most species of Hyrachyus. ~ 
The Wahsatch horizon of Wyoming has not yielded so man 
. h, the 
the marls of Rilly and lignites of Soissons, the Thanet sands, Lon- 
Fossils from these beds appear to have been no 
ter preserved than those of the Wahsatch beds of the Rocky 
Femecy =, American Philosophical Society, 1872, February and July. 
t Annual Report of Chief of Engineers, p. 502. 
characterte vies, described by me as Ba nsti tion of this genus, 
last lower se), the absence of tubercle or ridge between the inner cusps of the 
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