Manliiis Foriiiation of N'czij York. — Schuchcrt. 169 
Leperditia jonesi Hall. 
Cythcrina altaf Hall, Nat. Hist. N. Y., Pal., H, 1852, p. 338, pi. 78, 
figs. 2a-2d. 
Leperditia jonesi Hall, Ibidem, HI, 1859, 1861, p. 372, Also found in 
Herkimer County. 
THE MANLIUS FORMATION' OF VANUXEM.""^ 
This formation was called by Vaiiuxem the "Waterlime 
group of Manlius." Subsequently this najiie was displaced by 
Tentaculite limestone and the term Manlius did not agaii. 
come into use until 1899, when Clarke and Schuchertf revived 
it in accordance with the rules of priority and that a geologic 
formation shall take the geographic name of the place at which 
it was first studied. The typical section is at Manlius, Onon- 
daga county, New York. 
It is evident, from Vanuxem's description of the formation, 
that the term "Waterlime group" or rather the "Waterlime 
group of Manlius" was intended to cover all the waterlimes 
between the Salina and the Pentamerus limestone or Coey- 
mans. The fossils figured or mentioned, however, are those of 
the Tentaculite limestone with one exception and do not in- 
clude any of the Eurypfcrus fauna found in the lower water- 
lime of the same region. The formation, Vanuxem states, 
"consists generally of dark blue limestone, and usually of two 
la3^ers of drab or water-limestone; the two always separated 
by an intervening mass of blue" (p. no). "The line of sep- 
aration between the water-lime group, and the Onondaga salt 
group [Salina], is rather well defined at the eastern end of the 
district. There a brownish impure limestone is iseen, often 
mottled, containing columnarije of a som'ewhat spherical form, 
and about the size of an inch or more; also a few encrinital 
fragments, and a small orthocera, the species not named. This 
is the mass which separates the two groups, and forms the base 
of the water-lime group" (p. in). 
The writer has not seen the type section of the Manlius 
and on application to the state paleontologist of New York, 
Dr. Clarke kindly furnished the following account of it. 
"In the typical section in the hill east of Manlius village 
the blue limestones carrying Spirifer vanuxcmi, Tentaculites 
* Nat. Hist. N. Y.. GeoL, part iii, Surv. Third Dist.. 1842, pp. 110-116. 
t Science, x. 1899, pp. 874-878. 
