263 
[Foerste. 
bant to Locality I being 38 miles. The red slates of the interme- 
diate region belonging to the Olenellus Cambrian were associated 
by Professor Crosby and Mr. Barton in their studies on the Geol- 
ogy of the Norfolk County basin with the Carboniferous rocks but 
are probably also of Olenellus Cambrian age so that the Olenellus 
Cambrian may be seen to be a series of considerable extent in 
eastern Massachusetts, where at one time it formed a continuous 
sheet now broken by intrusive granite and diorite masses of large 
extent, frequently faulted. 
NOTES ON CLINTON GROUP FOSSILS, WITH SPECIAL 
REFERENCE TO COLLECTIONS FROM INDIANA, 
TENNESSEE AND GEORGIA. 
BY AUG. F. FOERSTE. 
INTRODUCTION. 
In the summer of 1886 it was my privilege to examine various 
Clinton Group collections made by Prof. N. S. Shaler, now in the 
students’ collections at Harvard University. A few species were 
from the Clinton of Anticosti. Two large trays of specimens had 
been collected in the Upper and Middle ore beds of Double Mountain 
in Claiborne Co., Tennessee, at the Crockett Furnace, in Lee Co., 
Virginia, and at other localities, chiefly in the immediate neighbor- 
hood of Cumberland Gap. Three large trayfuls came from Col- 
linsville, Ala., where they were collected by the Alleghany Expe- 
dition of the Harvard Summer School of Geology. 
Since the Georgia locality seems not to have been described, the 
following section is given in ascending order. Unfortunately, the 
relative thickness of each series is not preserved in the records : 
1, hard, thick-bedded sandstone ; 2, thick-bedded, yellow sand- 
stone, a building stone, containing in great numbers the Clinton 
fossils here described ; 3, sandstone ; 4, shale ; 5, dark, black 
shale, thin ; 6, flinty limestone ; 7, carboniferous rock. The sec- 
tion dips from 15° to 45° in a southeast direction. The results of 
my observations were not published at that time, since they were 
not of special value in identifying the Clinton fossils from Ohio, 
then under investigation. Recently, however, they have become 
