Review of the New York Geological Reports. 73 
very subordinate member of the New York system, and, for this 
reason, not represented on the chart by a separate color. 
village of Belona, Ontario county, afford opportunity for investi- 
gating the characters of the Tully limestone. 
No minerals of interest occur in it. 
In the fourth district fossils are rare in the Tully limestone, 
but in Vanuxem’s district they are more common. Some of the 
forms are here given :— 
Vanuxem’s Report, p. 163. 
gi 
Tul- 
ly limestone terminates all those 
: AY 
‘\ i 
| i 
Fig. 4. Airypa affnis. 
much of their original form as to be readily recognized. This 
tock forms a strong line of demarcation, not only in this respect, 
but also as regards fossils ; very few forms which are known be- 
low continuing into the rocks above. The lithological character 
Srconp Seruss, Vol. III, No. 7.—Jan., 1847. 10 
