1028 The American Naturalist. [December, 
dioritic stock as well as the adjacent cretaceous rocks, are cut by later 
vertical dykes having a general radial arrangement with the dioritic 
mass as an approximate center. In the northern half longitudinal 
uplifts produce long-crested ridges. The eruptive rocks, like those of 
the southern area, are younger than the enclosing strata. The dykes 
are innumerable; in one place a dyke was counted every fifty feet 
horizontal on a long spur. 
The great masses of crystalline rock and the honey-combing of the 
soft strata by dykes has enabled this range to resist the erosion which 
has levelled the adjoining country and made it what Warren Upham 
calls a good example of “an eroded mountain range.”—Bull. A. G. 
S., Vol. 3, 1892. 
Geological Survey of New Jersey, 1891.—The work accom- 
plished by the State Geologist and his assistants during the past year 
is reported by Mr. Smock as follows: 
A study of the surface or pleistocene formations of the northern 
part of the State, by Prof. Salisbury ; (2) an examination of the oak- : 
land and pine-land belts of the State, by ©. W. Coman ; (3) a contin- 
ued study of the water-supply and water-power, and (4) in co-operation 
with the United States Geological Survey, a study of the erystalline 
rocks of the highlands of northern New Jersey. 
Some notes on the active iron mines and on artesian wells have been 
collected. 
Numerous maps and charts accompany the report. 
A Hyena and Other Carnivora from Texas.—At a meet 
ing of the Philadelphia Academy Prof. Cope stated that he had dur = 
ing the past season while exploring the eastern front of the Staked pee 
Plains of Texas with the party of the Geological Survey of that State 
under Prof. W. F. Cummins, obtained the remains of some interesting 
carnivora from the Blanco or Pliocene beds. One of these is ale 
nearly allied to the genus Hyena, and the first species of this family : 
found in America. It, however, differs from the typical genus in we | 
ing a fourth premolar in the lower jaw, and probably in having 7 
shorter blade of the sectorial tooth in the upper. He proposed + 
name Borophagus for the genus, and for the species the name 
ens. The third lower premolar is very large and robust, eee 
ing the fourth in dimensions, The latter is low and molariform pes 
inferior canine is large. The measurements are as follows: ae Bae 
diameter of canine alveolus, 13 mm.; do. of posterior alveolus m 
