PROCEEDINGS OF SOCIETIES. 165 
method employed in the removal of the integument or skin 
which covers and conceals the vessels of the gill, thereby dis- 
closing the circulatory system and its true affinities. This is a 
point which has hitherto not been so well understood, for even 
Dr. Carpenter does not appear to have worked out this question, 
and all we know of the affinities of the circulatory and respiratory 
systems of the animal is from the elaborate paper of M. Milne- 
Edwards. That very nearly approaches the truth as to the various 
systems; but even M. Milne-Edwards has not gone so far as 
Mr. Whitney, to whom is really due the merit of having disco- 
vered the true affinity of the two systems. There is no doubt he 
has entirely cleared up the point. It no longer, I think, admits of 
being put as Dr. Carpenter puts it, in‘his work on the micro- 
scope, where he says—“ If Mr. Whitney’s account of the circula- 
tion in the tadpole be the correct one,” &c.; there can be no 
reasonable doubt of the correctness of these observations, and 
none, I am sure, can be entertained by any who has heard him 
this evening, and seen his beautiful illustrations. Mr. Hogg then 
proceeded to suggest that a point as to the efferent and afferent 
vessels might be cleared up by means of the micro-spectroscope. 
He thought it quite within the scope of the instrument, by the 
absorption-bands, to show the blood in the two systems, and the 
way in which the arterial and venous capillaries change places. 
However, since it so nearly coincided with the systemic plan in 
the higher animals, he had no doubt of the correctness of Mr. 
Whitney’s observations, which present us with a very complete 
account of the circulation in the more perfect as well as in the 
transitional state of the tadpole. 
A vote of thanks was then passed to Mr. Whitney for his paper, 
and the meeting adjourned to Wednesday, 24th April, when it 
was announced that the soirée of the Society will take place. 
LIST OF BOOKS PRESENTED TO, OR PURCHASED BY, THE 
STEETCAU ee SOCIETY DURING THE 
A D, 
Presented by 
Annals and Magazine of Natural History, Nos. 97, 98, 
99,100, 101 and 102, 108, 104, 105, 106,107, 108 Purchased. 
Intellectual Observer, Nos. 48, 49, 50, 51, 52, 58, 54, 
55, 56, 57, 58,59 . ; The Editor. 
Household Magazine, No. 1 : ; : Ditto, 
Photographic Journal, Nos. 164, 165, 166, 167, 168, 
169, 170, 171, 172 . Ditto. 
Popular Science Review, Nos. 18, 19, 20, 21 . Ditto. 
The Canadian Journal of Science and Art, Nos. 59, 60, 
Lt a ; : ‘ . Ditto. 
