556 PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
ANSWERS TO CORRESPONDENTS. 
B. W. S., Ky. — Fifteen volumes of the Proceedings of the Ameri- 
can Association for the Advancement of Science have been published: 
sci may be obtained of the Perpetual Secretary, Prof. J. Lovering, 
mbridge, Mass 
, Maine. —Among the most important works on Entozoa, 
or Intestinal Worms, are argc s Entozoa, 4to, London, 1867. 
Essay in Aitken’s Practice of Medicine. An Essay on Human Cestoids, 
by F. R. Sturgis, 8vo, ee) 1867. Human Cestoids, by Dr. 
F. Weinland, 8vo, 75 cents; a few copies of this last work may be had 
at this ol i he best descriptive work is Diesing’s Systema Helmin- 
thum, 2 vols. 8vo, published in Germany. See also Owen's article 
ma 
Entozoa, pas "Todd's atin of Anatomy and Physiology. 
F., New York.— Many instances of snakes charming birds and 
other animals have been recorded, but their power to do so is still 
doubted by many of the best authorities. 
. G. S., Penn.— Your so-called ‘‘horse hair” is a low parasitic 
hair-like worm, Gordius, pee lives in the young or larval state in the 
bodies of grasshoppers, etc.; but when it hecomes mature, crawls out 
of the body of its host, and lives in the mud at the bottoms of pon 
and in moist earth. 
ene al nel 
EXCHANGES. 
Andrew J. Bennett, Circleville, Ohio. — Would like to exchange 
Western be and fresh-water shells, for New England land and fresh- 
water s 
E. P. ne Nautical Almanac Office, Washington, D. C. —Would 
like to exchange U. S. Coleoptera. 
PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
i cocaine 
ASSOCIATION FOR THE ADVANCEMENT OF 
shire, with a few Remarks upon the Geological Structure of some 
Portions of that Group,” by George L. Vose, of Paris, Me. This was 
a detailed account of the observations of Mr. Vose in the Andros- 
 coggin, Peabody, ane other valleys of the region, confirming the view 
