Aprit 19, 1912] 
If a dwarf Orepidula be removed from a 
small hermit shell, and find lodgment else- 
where, it is readily seen that the inhibitory 
influence was merely temporary, since the 
dwarf then grows to the normal size. So too 
the confined Paramecium, after being liber- 
ated, soon begins the process of fission at the 
normal rate. 
A more detailed account of these experi- 
ments, together with some observations on the 
behavior of Protozoa confined in capillary 
tubes, will shortly appear in another publica- 
tion. 
G. C. Crampton 
MASSACHUSETTS AGRICULTURAL COLLEGE, 
AMHERST, MASS. 
SOCIETIES AND ACADEMIES 
THE MICHIGAN ACADEMY OF SCIENCE 
SECTION OF ZOOLOGY 
THE zoological section of the Michigan Acad- 
emy of Science met at the University of Michigan, 
March 28. Mr. Peter Okkleberg was chosen presi- 
dent for the coming year. The following program 
of papers was presented: 
‘<Results of the Mershon Expedition to the 
Charity Islands, Lake Huron, Amphibians and 
Reptiles,’’ Crystal Thompson and Helen Thomp- 
son, Ann Arbor. 
“‘Some Bird and Mammal Records for Mich- 
igan,’’ N. A. Wood, Ann Arbor. 
‘Directions for Collecting and Preserving Speci- 
mens of Reptiles and Amphibians for Museum Pur- 
poses,’’ Alexander G. Ruthven, Ann Arbor. 
‘‘The Breeding Birds of the Charity Islands, 
Lake Huron, with Additional Notes on the Mi- 
grants,’’? N. A. Wood. 
‘On the Wisconsin Wood-frog,’’? Helen Thomp- 
son. 
‘<«The Pickerel Frog, Rana palustris LeConte, in 
Michigan,’’ Crystal Thompson. 
‘«Fxternal Conditions and the Growth Period in 
the Eggs of Hydatina senta,’’ A. F. Shull, Ann 
Arbor. 
‘The Influence of Egg and Sperm in Inherit- 
ance of Egg Characters in Hydatina senta,’’ A. F. 
Shull. 
‘<The Origin of Continental Forms, 3. A Pre- 
liminary Note on Faunal and Floral Relations,’’ 
Howard B. Baker, Detroit. 
‘(A Collection of Mammals from Osceola 
SCIENCE 
635 
County, Michigan,’’ Orrin J. Wenzel, Ann Arbor. 
““The Mouth Reflex of Physa: May it be Sub- 
stituted for the Salivary Reflex of Pawlow in 
Studies of the Nervous System of Snails?’’ Eliza- 
beth Thompson, Ann Arbor. 
“‘Pseudohermaphroditism in the Brook Lam- 
prey,’’ Peter Okkleberg, Ann Arbor. 
““Factors that Determine the Location of the 
Borings of the Yellow-bellied Sapsucker in the 
Yellow Birch,’’ Margaret W. Taggart. (Pre- 
sented by Jacob Reighard.) 
“Report on the Zoological Work done at the 
Biological Station of the U. of M. at Douglas 
Lake,’’ Jacob Reighard, Ann Arbor. 
“‘Cestode Parasites of Fresh-water 
George R. La Rue, Ann Arbor. 
““New Methods of making in toto Prepara- 
tions,’’ George R. La Rue. 
“‘The Distribution of the Ancylide,’’ Bryant 
Walker, Detroit. 
““Preliminary Report on the Ecology of the 
Mollusks of the Douglas Lake Region,’’? H. Bur- 
rington Baker, Ann Arbor. 
“The Origin of the Germ Cells in the Toad 
Fish,’’ Emory Sink, Ann Arbor. 
“‘The Application of Calorimetric Methods to 
the Study of Embryology,’’ O. C. Glaser, Ann 
Arbor. ; 
““Notes on the Amphibia and Mammals of 
Gratiot County, Michigan,’’ H. M. MacCurdy, 
Alma. 
“¢Check-list of Michigan Lepidoptera. I. Rho- 
palocera (Butterflies),’’? W. W. Newcombe, De- 
troit. 
“Some Observations on the Muskrat Houses 
near Ann Arbor,’’ F. C. Gates, Ann Arbor. 
‘On some Amphibians and Reptiles from the 
State of Vera Cruz, Mexico,’’ Alexander G. 
Ruthven. 
Fish,’’ 
GEORGE R. LA RUE 
UNIVERSITY OF MICHIGAN 
THE HELMINTHOLOGICAL SOCIETY OF WASHINGTON 
THE tenth regular meeting of the society was 
held at Dr. Stiles’s residence on March 14, 1912, 
Dr. Stiles acting as host and Mr. Crawley as 
chairman. The receipt of a set of author reprints 
from Dr. Arthur Shipley for the society’s library 
was noted. 
Dr. Stiles reported that the Index-Catalogue of 
Medical and Veterinary Zoology dealing with the 
subjects Cestoda and Cestode Diseases, by Stiles 
and Hassall, was now in manuscript ready for 
