NATURAL HISTORY MISCELLANY. 999 
Dyer, of Cincinnati, an enthusiastic collector of Western fossils, some 
years since, and quite recently by Mr. Frank H. Bradley, of New 
Haven, a successful collector of specimens of Natural History. This 
bank is situated half a mile north of the city, in a bluff seventy-five 
feet above the bed of the river. The out-cropping has been so far 
explored, wee es and heavy excavations are — to reach the 
Crinoidal horizon. 
Crinoids or pe rinites are radiates belonging to the class of Echi- 
noderms, found chiefly fossil and extinct, there being but two sae 
species, the Comatula and Pentacrinus Caput Meduse. They are so 
named Bom their resemblance in form to the lily. They are Daa 
the most beautiful and wonderful fossils we have. 
The Encrinite consists of a calcareous root, a hollow jointed stem, 
a vasiform, or cup-shaped base upon its top, from which proceed arms 
with subdivisions; ey some of the arms are found very fine tentac- 
ula. Besides the ej Crinoids, there are others which were free, 
and some imbedded in mud. 
rinoids exist ates abundant in the oldest fossiliferous rocks, 
belonging to the Paleozoic and Mesozoic periods; so abundant are 
they in some localities in wé Paiti iid Jocalities, as to give character 
to the rocks, as Crinoidal or Encrinital limestone. They are found 
among the earliest of fossil animals. For a long ee their animal 
origin was Se till established by Rosinus, in 17 
of the genera described sae to the Silurian 
A large propo 
formation. The iadol species amount to about five hundred, 
HOVEY, 
and those in the rocks above to nearly one hundred. — E. 0. 
Wabash College. 
—_1O——— 
MICROSCOPY. 
Tur Surrace Fauna or Mm-Ocean.—In the sixth volume of the 
R. J. Owen describes sev- 
“London Microscopical Journal,” Major S. 
eral forms of towing nets for collecting microscopic forms at sea. 
Such nets the Polycystina, with their interesting allies the Acantho- 
Metra, and the eee can be found: 
. lvinulina and —— e = ga eats nae 
am persuaded t the genera Put 
e ste on the surface ofti 
rey 1e  Foremiatlore, wit be ound I ot mi "Atlantio. “From 
ae to nt sight ý 
Rhizopods, These two gene’ a veiis with the Orbulina of Dr. Carpenter, but which I 
have sub-genus of Globigerina, have been founa nd to be s Se ae ne 
bid the ocean that I have sailed . Different ed ae f creatures w e 
fou urface ii sunset till day- 
light the Polycystina, Foraminifera, Acanthometra, riper Pte suai ae 
Shelled Mollusca must be looked for; during the day the Crust oer? Thalass' 
Seis, ete., will repay our endeavors.” 
