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W. B. Dwight—Fossils of the Wappinger Valley Limestone. 389 
‘Art. XLVII.—On some recent Explorations in the Wappinger 
k 
Valley Limestone of Dutchess County, New York; by Professor 
M. B. Dwieut, of Vassar College, Poughkeepsie, WY; 
it attention was called to the — a character 
he Wappinger Valley limestone 
oe Dana to join him in deeaibathink a Poagan Valley, ofa 
reported locality of fossils doubtingly mentioned by Professor 
Mather.* In order to further the object in view, I made 
enquiries with regard to another reputed locality, at Boolian 
and the next day I was gratified to find the limestone pee 
abcunding in fossils. Since the excursion to this 
Pleasant Valley with Professor Dana, which took planes a 
few days later, I have continued my search in the Barnegat 
or Wappinger Creek dimedtane, he leaving the field to me, and 
have discovered still other localities ; and it is the object of this 
iy ¥8 to mention the facts thus far ascertained. 
my rp emi with this part of the country has been 
4 vege a brief one, and as my researches have been conducted in 
the scanty hours that could be snatched from my collegiate 
work during the last four weeks, the results which I here put 
on record should be regarded as merely preliminary to the 
_ more careful ee of this interesting formation which 
ope to 
The first ‘leoatity which I examined was one at Rochdale, 
_ above alluded to, where objects of peculiar forms had been 
_ reported to have been found, though there is no evidence of 
any scientific examination. It is situated four miles northeast 
_ of Poughkeepsie, on the premises of Mr. Henry Titus The 
_ limestone here has a dip of 60° southeasterly, with a strike of 
. 86° E. (true). The examination, though short, afforded me 
abundant evidence of fossils, and some determinable species, as 
_ follows :—Leptena sericea, an internal cast of the ventral valve, 
_ Showing the characteristic form mh an TS for visceral 
_ attachment, and the strize in reverse; two specimens it rite 
tricenaria ; small encrinal columns in aueed iva: 
shell, two and a half centimeters in diameter, exbikiied 6 oO 4 A 
section, imbedded in 
es these, there are ma ny specimens of a species of Recep- 
laculites. Groups of ipa or club-shaped columns, half 
an inch or so long, pro nward, somewhat radially, from a 
hollow but rather firm chell of irregular form which varies much 
A Se & Report, 184 
iT ce day oe mage knowledge my i mapaniermnggell poiirwest cil: J. 
_ Backus, of Vassar Cells foe for information of this locality, and ass 
ing out fossils, and to essrs. Henry an <aey pete oa we cates of a tack. 
dale woolen mills, for jena coéperation in the work. 
