102 Crinoidea from the Niagara Limestone. — Beachler. 
tures as may lead to a better understanding and more accu- 
rate classification of this confessedly the most obscure group 
of the massive rocks. 
We have been unable in the cases which have come under 
our own attention to establish any connection between these 
dikes and any great parent body of eruptives, although the 
existence of such is to be surmised. We are inclined to think 
that the walls must have been themselves within a zone of 
high temperature in order to admit of the penetration of such 
narrow bodies so great a distance from their source. 
Geological Laboratory ., Cornell University. 
NOTICE OF SOME NEW AND REMARKABLE FORMS OF 
CRINOIDEA FROM THE NIAGARA LIMESTONE AT 
ST. PAUL, DECATUR COUNTY. INDIANA. 
By Charles S. Beachleb. 
The limestone exposed at St. Paul,Ind., is a hard crystalline 
limestone attaining a maximum thickness of about fifty feet, 
over-laid by cherty layers intercalated by thin limestone 
layers. 
The only fossils heretofore found were large specimens of 
Orthocer^as simulator Hall, Orthoceras annulatum Sowerby 
and Gyroceras elrodi Sowerby, until about three years ago a 
small crinoid over-looked perhaps on account of its size, was 
found and described as Pisocrinus gemmiformis S. A. Mil- 
ler. This species was the only crinoid that had ever been 
found by the many collectors until recently when Mr. A. C- 
Benedict found a peculiar pear-shaped crinoid about twice the 
size of a grain of wheat. This specimen will probably be de- 
scribed by Messrs. Wachsmuth and Springer. 
The following is what Mr. Wachsmuth says in regard to 
this crinoid. "There is nothing about it to indicate it to 
be a crinoid and no pores or rhombs to make it a C3'stid." 
This crinoid has since been found by Drs. J. W. and Frank 
Howard, and the writer. 
The crinoids are found only on the weathered edges of this 
hard crystalline limestone, which makes them hard to see and 
very hard to chisel out. The largest collection of these small 
crinoids has been made by Dr. Howard. 
While at St. Paul the writer collected three crinoids which 
had not been found by Dr. Howard while making his collect- 
