Ricliuioiid Group of Cincinnati Anticline. — Focrstc. 345 
ton in the valley of Elkhorn creek, near Richmond, Indiana. 
Two large specimens were collected by John Alisener near the 
base of the Middle Richmond, at Richmond, Indiana. 
Cohiuinaria halli is typical of the Birdseye and Black river 
formations in Quebec and Ontario. It occurs in the Black 
River group of New York. It is found in the Trenton of Min- 
nesota, Wisconsin, Illinois, Kentucky, and central Tennessee. 
It is abundant in the Upper Lorraine at various localities in Bul- 
litt, Nelson, and Marion counties in central Kentucky, associ- 
ated with Beatricca nndulata. One specimen referred to this 
species was collected above the Hcbcrtella inscidpta zone at 
Concord, Kentucky. It occurs about eighteen feet below the 
top of the Lower Richmond near Clarksville, Ohio, and also 
twenty feet above the base of the Middle Richmond in Roar- 
ing run, in Warren county. Along Elkhorn creek near Rich- 
mond, Indiana, small specimens occur fifteen feet below the 
base of the Clinton. 
Calopoccia cribrifoniiis is probably identical with Cal- 
opoccia canadensis. It occurs in the Birdseye near Otta- 
wa ; in the Black river at the north end of lake Huron, 
in the province of Quebec, and on Anticosti ; in the Galena- 
Trenton in Manitoba and in the district of Saskatchewan ; and 
in the socalled Hudson river of the northern end of lake Hur- 
on, in the province of Quebec, and on Anticosti. It occurs in 
beds which may belong to the top of the Lorraine at the Lang 
Smith locality, a mile and a half southeast of Chicago, in Ken- 
tucky, and at the home of George Raley, 3 miles southeast of 
Lebanon, Kentucky. It has been found by Dr. G. M. Austin at 
the top of the Lower Richmond, in Cowans creek near Clarks- 
ville, Ohio. Two specimens were collected by John Misener at 
Richmond, Indiana, one near the top and the other near the bot- 
tom of the Middle Richmond. 
Tetradmm minus is probably identical with Tetradiuni 
Hbratuni. These forms range from the Birdseye and Black 
River formations in Canada, to the Galena-Trenton in Man- 
itoba; and to the Trenton in Kentucky and Tennessee. Tet- 
radiuni minus occurs at the top of the Lorraine near the mouth 
of Bull creek, in Clark county, Indiana. In southern Indiana, 
Ohio, and Kentucky, it is common at the top of the Upper 
Richmond. 
