21 
FIFTEENTH REPORT. 
30. 
31. 
Some Abnormalities Observed in Proteocephalid Cestodes. G. La- 
Rue. 
Note on a Cestode Found in a Garter Snake, (i. LaRue. 
Some Observations on Intestinal Villi. O. M. Cope. 
Some Physiological Changes in the Lamprey Egg after Fertilization. 
P. Okkelberg. 
A Collection of Fish from Houghton County, Mick. T. L. Hankin- 
son. 
■ >o. 
34. The Lagoons and Ponds of Douglas Lake, Cheboygan County, 
Mich. IT. B. Baker. 
The Shiras Expeditions to Whitefisli Point, Mich. 
1. Birds. N. A. Wood. 
2. Mammals. X. A. Wood. 
.‘I. Amphibians and Reptiles. Crystal Thompson and Helen Thomp- 
son. 
Notes on the Ornithology of Clay and Palo Alto Counties, Iowa. 
A. I). Tinker. 
A (’heck-list of Michigan Mammals. X. A. Wood. 
The Variations in the Number of Vertebrae and \ entral Scutes in 
the Genus Cegina. Crystal Thompson. 
An Artificially Produced Increase in the Proportion of Male Pro- 
ducers in Hydatina Senta. A. F. Shull. 
Seminiferous Tubules of Mammals. G. M. Curtis. 
Paedogenetic Larvae of Insects. R. V . Hegner. 
Fifteen minutes will be allowed for each paper unless otherwise 
specified. The time may be extended by vote of the members present. 
Papers presented by persons not present at the meeting will be 
read bv title onlv. 
3fi. 
* * T 
O ( . 
3$. 
3ft. 
40. 
41. 
SECTION OF BOTANY. 
Thursday , 9:00 a. in. and 1:30 />. in. 
Biometric Studies in Oaks. 10 minutes. (With lantern). Carl Oberlin. 
Biometric Studies in Oaks. 10 minutes. (With lantern). J. H. Fillers. 
The Origin of Capsella Arachnoidea. 40 minutes. (With lantern) 
Henri Hus. 
The Antitoxic Action of Chloral Hydrate upon Copper Sulphate for Pea 
Seedlings. 15 minutes R- P* Hibbard. 
Improved Methods for the Quantitative Determination of Dilute Solu- 
tions of Electrolytes. 10 minutes R. P. Hibbard. 
Effect of Illumination on the Twining of Plants. 12 minutes 
F. C. Newcomb. 
Conditions for the Diageotropism of Asparagus Plumosus. 10 minutes. 
Margaretta Packard . 
\ Heteroprophic Mvcorhiza. 10 minutes. (With lantern) 
Walter B. McPougall. 
Some Notes on the Black Knot of Plums. 10 minutes. ,.T. A. McClintock. 
Some Further Observations on Sclerotinia. 10 minutes. . . .J. B. Pollock. 
A Sand-binding Fungus. 8 minutes • • • -L B. Pollock. 
Tin* FHie Dunes of Little Point Sable. 8 minutes. (With lantern)... 
W. E. Praeger. 
