+ 
386 Scientific Intelligence. 
are the Cretaceous, the Jurassic and Triassic or Red beds, about 
325 eat une at the northern base of the Black Hills, a limestone 
formation lying wneonformably beneath the Red beds, which is 
Sirtcnitevous at top and may include other formations, and the 
Potsdam sandstone. Beneath the last are metamo orphic schists 
oa slate with high angle of dip, and granite. We understand 
fro + G: 5, Grinnell, that the credit of identifying the fossils 
paentioned 3 in Prof. Winchell’s s Report should have been given = 
. latter to Mr. R. P. Whitfield, instead of to hims elf. J.D. D 
Creek, Adams County, O., preparatory to eae fonricaetont for 
the abutments of a brid e, discovered a pair of enormous horns 
about eighteen feet below the surface. On examination it was 
found that they were only the cores of the original horns, the ex- 
terior portion having perished. They measure nearly six feet 
; A 
ine 
the core of the horns of the ox is about one-third of the entire 
m vA 
hem. 
On the Mesozoic pation of Mexico and its character- 
istic Jee by Marrano Barcena. 37 pp. 8vo. Mexico, 1875. 
—In this Memoir (in Spanish) Mr. Barcena treats of the distribu- 
tion of the Cretaceous rocks of Mexico, their kinds and their fos- 
e rocks include ils stones, art of them metamorphic, 
and the author consequently proposes that the map of Nort 
America in the Cretaceous period, which is given in Dana’s Man- 
ual of Geology should be changed, by making the area of Cre- 
taceous seas to extend from ‘Texas westward to the Pac 
Ocean—the facts serving to prove that the Gulf of Mexico — 
h ific were actually connected in the Cretaceous per 
The Cretaceous area thus added, as shown on a ma 1 
ing the Memoir, lies between a "line from the Pacific to the Gu 
northeast in n course, running tt through Chihuahua, — 
other parallel thro accel Vera Its extension northwest 
ciate fatite determinati 
tion. 
