The Neiv York Series. — Clarke and ScJiueliert. 1 19 
16. Lowville limestone (new) ; instead of Birdseye limestone of 
common use. Lowville is a town in Lewis county, N. Y., where these 
beds are well exposed. 
17. Hudson River beds. It is becoming increasingly evident that 
the great mass of shale in the Mohawk and Hudson river valleys which 
was designated at an early date by this term is resolvable into horizons 
extending from the middle Trenton to and including the Lorraine beds. 
At present it seems imlikely that when this determination of horizons 
has been carried through the series any part will remain to which the 
original term can be applied by virtue of its distinctive fauna, though 
it may still serve to designate a facies of the formations mentioned. 
18. Rondout waterlime (new). From the fine development of these 
beds in the extensive cement quarries at and near Rondout, N. Y. 
19. Manlius limestone. Tentaculite limestone of Gebhard. Mather 
and later writers. The name here used was introduced by Vanuxem 
and is entitled to first consideration. Manlius is the place of typical 
exposure in Onondaga county, N. Y. 
20. Coeymans limestone (new) ; and 
21. New Scotland limestone (new). These terms designate re- 
spectively the Lower Pentamerus (Helderberg and Pentamerus lime- 
stones of the New York geologists) and the Catskill or Delthyris 
Shaly limestone. Coeymans and New Scotland are adjacent towns in 
Albany county, N. Y., through which runs the Helderberg escarpment 
aflfording the finest exposures of these formations. 
22. Becraft limestone. This name was introduced by N. H. Dar- 
ton with the sanction of professor James Hall, for the beds previously 
known as the Upper Pentamerus and Scutella limestones of the Hel- 
derberg sections. The present name is derived from Becraft moun- 
tain, Columbia county, N. Y. 
23. Kingston beds (new). The 'upper shaly beds' of W. M. Davis, 
which are typically exposed and attain a thickness of 250 feet in the 
vicinity of Kingston, N. Y. 
24. Esopus grit. Proposed by Darton, with the approval of pro- 
fessor Hall, for the old term Caudagalli grit. It has been suggested 
by Freeh, that the Esopus grit should be regarded as a part of the 
arenaceous sediments of the Oriskany. The very few fossils which it 
contains, however, do not as yet fully endorse this suggestion. 
25. ■ Catskill sandstone. This is an approximate expression of the 
value of this formation. Catskill sedimentation doubtless began as 
early as Portage time, its representation during which is expressed 
in the term, Oneonta htA'i.— Science, December 15, 1899. 
