The New York Series. — Clarke ajid Schiiehert. 117 
5. Cincinnatian. The formations of the Neo-champlainic are not 
as completely developed in the State of New York as in Ohio and In- 
diana. In the latter sections the Lorraine fauna is represented, but 
is followed above by the well-defined fauna of the Richmond beds. 
Probably in no other region is the succession of these faunas so com- 
plete as about Cincinnati, and this fact justifies the recognition of the 
term Cincinnatian, which already has historic value. For a full descrip- 
tion of the series by Winchell and Ulrich, see Geol, and Nat. Hist. 
Surv. of Minn., vol. 3, pt. 2, pp. ci-cv., 1897. 
6. Oswegan. This name is appropriate on account of the wide- 
spread occurrence of the Oneida and Medina formations in Oswego 
county, N. Y. Vanuxem employed the term 'Oswego sandstone' for 
the formation subsequently and by common consent called Medina 
sandstone. In reviving the name, though with a broader meaning than 
in its original use, it derives its title from its early date. 
7. Niagaran. In the sense suggested by professor Dana. 
8. Cayugan (new). The divisions of this group are knit together 
by lithologic and faunal characters and are distinctly Ontaric. The 
outcrops are typically exposed about the north end of Cayuga lake, 
N. Y. 
9. Helderbergian. The present state of our knowledge does not 
permit the use of, the term Helderberg in its original scope. The 
'Helderberg division' was made to embrace formations now regarded 
as constituting the lower and part of the middle Devonic. We propose 
to restrict the term Helderbergian to the formations currently known 
as 'Lower Helderberg,' excluding the 'Tentaculite limestone.' 
10. Oriskanian. The Oriskany formation varies considerably in 
the character of its sediment. Its calcareous facies is highly developed 
in eastern New York, while the more siliceous sediment excludes all 
others in the central part of the state. The fauna of the Oriskany from 
its lowest beds, as at Camden, Tennessee, to its highest beds, as in the 
province of Ontario, shows progress in dififerentiation, but it is not yet 
practicable to subdivide the New York development of the fauna. 
11. Ulsterian (new). From the outcrops of all the members in 
Ulster county, N. Y. 
12. Erian. The 'Erie division' comprised the formations from the 
top of the Onondaga limestone to the top of the Chemung. We pro- 
pose to save the term to the New York nomenclature by reviving it 
with a restricted meaning. 
13. Senecan (new). In Seneca county and along the shores of 
Seneca lake are excellent exposures of these beds. 
14. Chautauquan (new). From exposures in Chautauqua county, 
N. Y. 
15. Beekmantown limestone (new). The Calciferous sandrock of 
Eaton and authors generally. This formation took its original name 
from sections in the Mohawk valley, where the rocks are without fos- 
sils. At Beekmantown, N. Y., the normal fauna is finely developed 
and the rock section essentially complete. 
