Mineralogy and Petrography. 837 
(1) The Dinotherium giganteum from the upper miocene of Attica, 
the tibia of which, brought from Pikermi by M. Gaudry, measures 
0.94m. in length, representing a height of 4.43m. at the shoulders, 
and 4.96m. at the top of the head. (2) The Elephas antiquus, 
found in the quaternary near Paris, height at the withers 3.95, 
and to thesummit of the head 4.42m. (3) The Elephas meridionalis 
from the pliocene of Durfort, which is the largest entire mammalian 
skeleton (fossil) yet known, and is now at the Paleontological 
useum in the Jardin des Plantes; its height at the shoulders is 
3.77m., and it measures 4.42m. to the top of the head. (4) The 
Mastodon americanus from the quaternary of the United States 
Measures 3.55m. to the top of the head. (5) The Elephas primi- 
genius, or mammoth of the Siberian quaternary, is 3.42m, to the 
top of the head. 
MINERALOGY AND PETROGRAPHY:! 
PETROGRAPHICAL News.—In a late number of the American 
Geologist,? Messrs. Herrick, Clarke and Deming have a short arti- 
cle on some American norites and gabbros. Three rocks are 
described. The first is from Marshall Co., N. C., and is called 
olivine-norite. Its feldspathic constituent is labradorite, and its 
pyroxene is regarded as bronzite. The second—a porphyritic dio- 
nite, contains garnet and apatite. It is a facies of the norite. The 
Duluth gabbros are finally taken up and briefly described. In one 
Phase of this rock the authors think they have found feldspar crys- 
tals, with a central core of labradorite, surrounded by a zone of ortho- 
clase. Very little new is stated in regard to these rocks, except the 
view that the orthoclase-gabbros may be derived by the action of 
solutions (emanating from acid rocks) upon olivine-gabbro. The 
paper contains the statements of many important views, which, 
however, will not generally be accepted by petrographers unless 
substantiated by many more facts than the authors have been able 
to discover.—An instructive paper on some English tachylites is 
that by Mr. Cole in the Quarterly Journal of the Geological Society.* 
In it he describes a glassy basalt which exhibits all the stages in 
e transition from a glassy to the completely spherulitic forms so 
familiar among acid lavas. The spherulites are sometimes com- 
posed of an intergrowth of gray and brown fibres, which show the 
seas tk Dr S. Bayley, Colby University, Waterville, Maine. 
? May, 1888, p. 300, 
