W. B. Dwight— Wappinger Valley Limestone. 58 
The conclusion is unavoidable that the rock in question is 
Calciferous; and it is probable that the portions containing the 
Ophileta are the “fucoidal layers” of the upper part of the 
formation. The description of these layers given in Vanuxem’s 
Report (p. 30) applies exactly to those of Dutchess County. 
In carrying my investigations lately to the continuation of 
this limestone belt across the Hudson River, I received informa- 
tion from Mr. J. N. Weed, Cashier of the Quassaic Bank of 
Newburgh, N. Y., of a fossiliferous locality near that city. It 
has proved to be very rich in fossils, both as regards number 
and variety. Their presence here has certainly been known 
to one prominent geologist; but it was evident that no careful 
examination had been made, as there was scarcely a mark of a 
encrinal columns and of fine Chetetes. One of the most 
remarkable features is the presence of many specimens (I have 
collected about twenty), of an unusually large encrinal column 
for this geological horizon, and one never collected (I believe) 
in this State before. It is from one-half to three-fourths of an 
inch in diameter, and has been identified by Mr. S. W. Ford 
a le magnificus Billings, hitherto a Canadian fossil 
on 
I have also found here the following fossils which are unmis- 
takably identified (except for doubts already stated as to 
Ch. compacta.) 
Orthis Lynx, several; Orthis pectinella, many ; Rhynchonella — 
capax, several ; Leptena sericea, several ; Strophomena alternata, 
abundant; Diseina, new species, many ; Cheetetes compacta, ver 
abundant; Cheletes lycoperdon, var. ramosus, abundant; at: 
umns of Schizoerinus nodosus, abundant ; head-plates of Eehino- 
encrinites anatiformis, abundant. 
In addition, there are probably the species O. tricenaria and 
Petraia (Streptelasma) corniculum, with pentagonal crinoidal 
columns, and some brachiopods too indistinct perhaps to be 
identified. 
The Discina is one to one and a half centimeters in diameter, 
with an unusually conical lower value, and a nearly flat upper 
