THE SCIENTIST. 
f)7 
rich brown purple, sometimes almost 
bronze-color. 
Of the many species of Spiranthes, S. 
fiernua, Kichard., is the most beautiful. 
From the curiously twisted flower 
stalk, comes the name "Ladle's Tresses.'' 
The white flowers of this little orchis are 
very fragrant. It is the last of the 
family, blooming late in September and 
on into October, often in company with 
the fringed gentian. 
For the Scientist. 
The Trenton Limestones and 
Hudson Kiver Shales. 
By R. R. Rowley, Curryville, Mo. 
As the first of this series of articles on 
the Palaeozoic rocks of Pike County be- 
gan with the Edgewood outcrop, the un- 
der strata of the Hudson and Trentun 
Groups were passed without notice. 
In many parts of the county the Tren- 
ton Limestone is exposed along the 
streams and is everywhere a hard bluish 
colored stone, weathered into countless 
holes and usually filled to repletion with 
fossils. 
The best exposures are near McCune 
Station on Peno Creek, along Buff"alo 
Creek and at the lower ford on Calumet 
Creek. 
The fossils are usually casts and 
the most abundant species are Assaphus 
sp? several species of Orthoceras, Gom- 
phoceras and Endoceras. Some of the 
Orthoceratites are of huge dimensions. 
Murchisonia bellicincta, M. bicincta, M. 
gracilis, Tro^.honema umbllicata, Subu- 
lites spf Baphistoma lenticular e, Maclu- 
rea sp? Fusispira spf Streptelasma cor- 
nicula^ Halysiles catenulata? Beceptaculi- 
tes oweni, Bhymchonella increbescens^ Or- 
this lynx^ 0. perveta. 0. insculpta? Strep- 
torhynchus filitextus^ S. spf Strophomena 
deltoidea. 
Near Auburn in Lincoln County, the 
Trenton Limestone contains a great 
abundance of soft flints charged with 
small fossils, some of which are in a fine 
state of preservation and occasionally 
specimens are found weathered out. 
The species embrace a Ceraurus.^ Assa- 
phus megistos? a fine Cyrtoceras^ Ortho- 
ceras arcuoUratum^ 0. spf Cyrtolites^ 
(five species,) Cyclonemf sp f Murchiso- 
nia bicincta^ 31. gracilis^ Ilelicotoma .^j) f 
several other Gasteropods, Orthis perveta, 
O. tricenaria, 0. pecUinella., Streptorhijn- 
chus filitextus^ Orthis testudinaria^ Bhyri- 
chonella increbesceiis, Zygospira recur- 
virostris, Z.sp f Camarella f spf Petraia 
sp f Arch(Eocrinus sp f Monticulipora 
discoidea, M. lycoperdon, M. sp f and 
Columnar ia alveolataf The last species 
is found weathered out and lying in the 
fields in masses from a few to a hundred 
pounds in weight. Occasional specimens 
of a huge Orthoceras are also found 
loose. 
Hudson River Shale. 
Overlying the Trenton Limestone at 
many points in the county are from a 
few feet to fifty feet of soft blue shales 
with thin bands of limestone. Many of 
these outcrops yield no fossils. Along 
Noix Creek, fragments of Assaphus me- 
gistos and a large Lingula have been 
found. 
Near the mouth of Buff*alo Creek, 
Orthis Subquadrata, 0. testudinaria, 0. 
acutilirata, Bhynchonella capax., Strep- 
torhynchus planumbona, Marchisania bi- 
cincta, Monticulipora spf (a cylindrical, 
branching species) and a massive species 
of the same Coral, have been picked up. 
On the head waters of Calumet Creek, 
an entire specimen of Assaphus megistos, 
about twelve inches in length, was found 
some yfears ago and taken from the county. 
At the same locality, several species of 
Monticulipora and a Conularia yvere col- 
lected. 
A gentleman named Scboll, living in 
the Calumet neighborhood is reported 
to have an almost perfect specimen of 
Assaphus and the writer has two small, 
