146 TRANSACTIONS OF THE [MaAR. 30, 
and in the collections of Columbia College, New York, there are 
plates from the same horizon at Plattsburg, N. Y., having the 
form and markings of Plumulites. In view of the very diverse 
types of Cirripedes figured by Dr. J. M. Clarke,* in which the 
individual plates show no greater diversity of form than those 
called Plumulites by Barrande, it seems to me quite within the 
range of convenient use to utilize this term of Barrande for 
detached, corrugated plates of Cirripedes of the Ordovician and 
earlier time. Perhaps a fortunate happening of discovery shall 
before long enable us to relegate certain of them to a more defi- 
nite genus. : 
St. Joun, N. B., Canapa, March, 1896. 
REGULAR PusLic LECTURE. 
March 23d, 1896. 
The Academy met in the Law School of Columbia University 
to listen to the regular public lecture for the month. Professor 
STEVENSON presided, and about 350 people were present. 
Before the lecture began the following two names were pre- 
sented for resident membership and referred to the Council in 
the regular course: Mr. A. S. Frissell, Mr. Thaddeus R. White. 
President STEVENSON then introduced Professor M. I. Pupin, 
who delivered the lecture on “‘ Roentgen’s Discovery” and illus- 
trated his remarks by experiments and the lantern. At the close 
of the lecture a vote of thanks was given the lecturer. 
‘The Academy then adjourned. 
J. F. Kemp, Secretary. 
STATED MEETING. 
March 30th, 1896. 
The Academy met and listened to an address by the retiring 
President, Professor J. K. Rees, upon the subject “ Some Prob- 
lems About to Confront Astronomers of the Twentieth Cen- 
* Am. Geologist, vol. xvii., No. 3, p. 143. 
