DEVONIAN SECTION OF ITHACA, N. Y. 105 
from the Hamilton is the case of the minute species Dalmanella 
lepidus Hall, reported to have been found in only a single locality 
on the shore of Canandaigua Lake, Ontario County, N. Y., and in 
few individuals.t In the great number of faunules gathered and 
examined from the sections now under investigation and the neigh- 
boring regions of the Watkins Glen and Catatonk quadrangles not 
a trace of the genus Dalmanella has been seen below the Nunda- 
Chemung boundary line (i.e., not in the Nunda, Ithaca, Genesee, 
or Tully formations). In the Chemung rocks, however, the genus 
is represented by at least three species, and in some zones abundantly. 
The species Dalmanella tioga is common and often met with in 
the Chemung rocks of this section from a horizon, 100 feet above 
the base upward for five hundred feet where it becomes less frequent. 
In the first one hundred feet it is represented by the smaller 
species Dalmanella leonensis, which in some zones is abundant; 
but this species has not been recognized in this region above about 
one hundred feet from the base of the Chemung formation. 
The genus has been observed in seven faunules from the Watkins 
fifteen-minute quadrangle. In all these cases the faunules present 
other indications of a horizon at the base of the Chemung and the 
line has in all cases been drawn to include the genus in the Chemung 
formation. 
In the Elmira quadrangle the genus has been observed in fifty-one 
faunules, and in all of them the evidence, on other grounds, leaves 
no doubt as to the Chemung horizon of the strata containing them. 
Twenty-nine faunules from the Ithaca quadrangle are equally 
clear as to the stratigraphic horizon to which the species of this 
genus belong. 
From the Waverly quadrangle eighty faunules contain one or 
other species of the genus, and regarding none of them is there 
doubt as to the stratigraphic horizon to which they belong. 
From the Dryden quadrangle fifteen faunules hold representatives 
of the genus. 
In the Owego quadrangle the genus has been seen in seven 
faunules. 
In the Apalachin quadrangle three cases have been recorded; 
t Paleontology of New York, Vol. IV (1867), p. 46. 
