a thelial ; and 3d, the nervous. 
206 Proceedings of Scientific Societies. [ March, 
6th, aged 66 years. Messrs. Redfield, Rogers, and Leidy were 
_ appointed a committee to draft resolutions expressive of the 
Academy’s esteem for Dr. Beadle. The annual reports of the 
Sections were then read and referred to the publication committee. 
January 14.—Dr. Ruschenberger in the chair. Mr. Redfield 
for the committee, offered a resolution Piniitie the death of Dr. 
Taan which was unanimously adopted 
. A. Kelly exhibited some handsome and perfect casts of 
acacias taken from the animals themselves in gelatine molds. 
Mr. Ryder said he had recently observed that the jaws of herbi- 
vora were moved from without inwards, instead of the reverse, 
which threw new light upon the subject of the “ mechanical gene- 
sis of tooth-forms.” Dr. Leidy exhibited some lemons with a 
species of coccus or scale insect adhering to the rind, which he 
thought might become a serious pest in Florida, from whence the 
specimens were obtained. A letter accompanied with blanks, 
from Charles F. Folsom, was read by the President, requesting 
the coöperation of the members of the Society, in the collection 
of statistics relating to the subject of heredity. 
ecember 16th, 1878.—Biological and Microscopical Section, 
Dr. R S: Kenderdine in the chair. Professor J. Gibbons Hunt 
delivered a very interesting lecture on the lichens. His remarks 
were beautifully illustrated by many fine specimens ‘of his own 
preparation, demonstrating the minute structure of these simple 
plants, which are found everywhere encrusting rocks, stones, the 
bark of trees, etc. A dish in which a large number of specimens 
were tastefully arranged by Professor Hunt under a bell-glass 
attracted much attention, forming as it did a display quite equal 
in beauty to the handsomest fernery. Speaking of their habitat, 
the speaker said that these, as well as many other interesting 
plants, were found in the greatest profusion and variety in the 
swamps of New Jersey, which he called the paradise of the bot- 
anist. After going briefly over the classification of these - 
plants, the. lecturer entered upon their anatomy. The great 
interest and value of the study of these plants as a means of men- 
tal discipline, and their use in the arts of design, were also dwelt 
upon by the speaker. Mr. Lewis exhibited a specimen of a rare 
wheel animalcule of marvelous beauty belonging to the genus 
Stephanoceras from the vicinity of Philadelphia. 
Jan. 6.--Biological and Microscopical Section, Dr. R. S. Ken- 
derdine in the chair. Dr, Carl Seiler favored the society with a 
discussion of the leading facts of animal histology, the branch of 
science which has for its subject-matter the consideration of 
the various kinds of cells composing animal bodies. He con- 
sidered the. classification of the living tissues accordi ing to their 
offices. These,‘he said, could be very simply and conveniently — 
-. 
-divided into three classes, as follows :—Ist, connective; ad, epi: a - 
