Proceedings of the N. Y. Lyceum. 173 
24th.—The Anniversary Oration was pronounced by the 
Rev. Mr. Schaeffer. 
A note was read announcing the receipt of zoological 
specimens brought by Mr. A. Vaché from the S. Atlantic 
and Pacific ocean. 
31st.—Mr. Barnes delivered an Introductory Lecture 
on the study of natural history. 
April 7th.—Dr. Dekay reported on the scutella quinque- 
fora, and on the ophiura tetragona. 
r. Barnes presented a specimen of an extinct animal, 
(sosupposed,) and described by Say as the pentramite, 
commonly called althea bud. 
Dr, Dekay delivered a Lecture for the evening, being a 
oe on the Literary History and Anatomy of 
hes. 
origin. It strongly resembles in external appearance the 
amygdaloid from Patterson, N. J. 
_ Dr. Akerly delivered a Lecture on Polyps or Zoophites, 
illustrated by splendid transparent figures. e : 
—Dr. Mitchill read a Lecture on Parasitical Ani- 
mals which he divides into molluscous, arachnidal, crusta- 
ceous, insects, and zoophites. 
28th --Dr. Mc N sivik read a Lecture on Electrick Mag- 
netism. 
_ May 5th.—A suite of minerals opp — _ Mex- 
ico, illustrating the geology of Mont Catherine de Urevas. 
Mr. Gecene predated some interesting shells from Wap- 
Penger’s Creek. : 
_ Dr. Mitchill read an analysis of a work lately aa 
in Paris, on Fossil Trilobites by M. Brongniart, a pes 
Crustacea by M. Demarest. It is a matter 0 reat ee 
80 few of the N. American Trilobites are known to the dis- 
Unguished author. 
12th._-Dr. Van Rensselaer rea 
Formations of America. 
da Lecture on the Salt 
