No. 9.—CIRCULATORY AND RESPIRATORY SYSTEMS 
OF DESMOGNATHUS FUSCA. 
BY ANNE BARROWS SEELYE. 
Introduction. 
The discovery of lungless salamanders in 1894 by H. H. Wilder, 
and the physiological investigations by L. Camerano in 1894 and 
1896, of two European forms without lungs, suggested an interesting 
field of study in the integument, considered as an organ of respiration, 
of one of our native salamanders, Desmognathus jusca. As the in¬ 
vestigation proceeded, it became evident that the field would have to 
be widened to include physiological experimentation and a study of 
the circulatory system. My investigations have therefore been divided 
into three parts: first, anatomical and histological studies of the integ¬ 
ument and its capillary supply; second, physiological experiments to 
determine the seat of respiration and the permeability of the skin: 
and third, an anatomical study of the entire circulatory system, in¬ 
cluding the distribution of capillaries in all regions where respiration 
seemed possible. Of these three parts the last has received most at¬ 
tention and been most fruitful in results. 
The larger part of the work has been carried on in the Zoological 
laboratory of Smith college, at the suggestion of Prof. H. H. Wilder 
and with his helpful advice throughout. I am glad of this opportu¬ 
nity to express my gratitude and indebtedness to him. For a half 
year, in 1897, I pursued these investigations in the Anatomical labo¬ 
ratory of Brown university by the courtesy of Prof. H. C. Bumpus 
who kindly put at my disposal the abundant resources at his com¬ 
mand. It gives me pleasure to acknowledge my gratitude to Pro¬ 
fessor Bumpus. 
ubrarv 
NEW YOR 
BOTANICA 
garden. 
The Integument. 
Desmognathus jusca has a smooth, slimy skin, attached closely to 
the muscles beneath it, except in the regions on each side of the neck 
posterior to the jaws, and under the lower jaw and throat. In these 
places it is loose and easily removed. The color is dark slate on the 
