1893. | Geology and Paleontology. 561 
laria decurrens, Textularia serrata, Bulimina trigona, and Bolivina 
strigillata. (Quart. Journ. Geol. Soc., Nov., 1892). 
Cenozoic.—The Pliocene fauna of Rousillon, which now numbers 
over 30 species of vertebrata, has recently had a second Proboscidian, 
Mastodon borsonii, added to the list of mammalia. The specimen, found 
near Villeneuve-de-Raho, consists of the series of upper molars, a tusk, 
and a part of the right occipital region. This discovery is important, 
as it gives a wide geographical range to M. borsonti, which has not 
before been known from any pliocene bed of southern France. (Revue 
Scientifique, Mars, 1893.) 
Dr. Noetling, in a report on Jade in Upper Burmah, says that jade 
is found in association with and enclosed in an eruptive rock closely 
resembling serpentine, and that this serpentine pierces strata of perhaps 
lower, but more probably Upper Miocene date. The jade found in 
Burmah belongs to a group of eruptive rocks of late Tertiary age. 
(Nat. Sci., April, 1893.) 
The prevalence of lake basins in glaciated countries is accounted for 
by Mr. J. C. Hawkshaw by the following conditions: 
Earth movements in limited areas tend to form basins; these move- 
ments are gradual, and, under ordinary circumstances, the basins are 
obliterated by water-borne detritus, growth of vegetation and erosion. 
In glaciated regions the basins are not only protected by the ice from 
such destructive action, but they are still further deepened by its 
grinding action. (Nature, April 13, 1893.) 
M. M. Boule has described and figured the Hyaena brevirostris found 
by M. Aymard in the Pliocene deposits of Sainzelles near Puy (Haute 
Loire). Although this fossil has been referred to by Pomel, Gervais, 
Gaudry and Weithofer, no detailed description of it accompani 
figures has ever before been given. (Ann. Sci. Nat. Zool. t. XV, 1893.) 
According to Mr. R. T. Hill, the Hematite and Martite iron ores of 
Mexico occur in the Cretaceous and Tertiary rocks, and are undoubtedly 
of later age than the rocks in which they occur. This is an unusual 
geologic age for ore. (Am. Journ. Sci., Feb., 1893.) : 
Mr. Warren gives, as a result of a comparison between pleistocene 
and present ice-sheets, an opinion that the Ice Age was a continuous 
and geologically brief period. (Bull. Geol. Soc. Am., Vol. IV j 1893.) 
Mr. E. T. Dumble reports the occurrence of Grahamite in two 
localities in Texas. The first specimen came from the Fayette beds in 
Webb County, the second from the lowest strata of the Eocene exposed 
on the Rio Grande River in Fayette County. (Trans. Am. Inst, Mine 
Engineers, 1892.) 
