PROGRAM AND ABSTRACTS FOR T H E TTVENTYSECOND ANXTJAL ME E T I N G OF THE Ab€ERIICAN SOCIETY O F ZOibLOGISTS WASHINGTON, D. c., DECEMBER 29-31, 1924 These titles and abstracts make up the 1924 program of the American Society of Zoologists. They were received either by the Secretary of the Society or by the Secretary of the joint Genetics Sections of the Society with the Botanical Society of America on or before November 20th and have been arranged according to the accepted program rules. The abstracts a r e in the form contributed by their authors. They have been edited only to secure a uniform system of titles and to reduce length when obviously overlong. Their arrangement arid the planning of the program can be done only after the titles a r e all in hand and must be greatly rushed in order t o obtain publication before the meetings. The T i s t a r Institute is scheduled to mail out this issue of The Anatomical Record three weeks, to the day, after receiving the manuscript. All proofreading will be done there. They deserve great credit for making possible the early publication and distribution of this material. These abstracts and the accompanying historical data and revised membership list a r e presented as a p a r t of the official proceedings of the 1924 meetings of the Society. The minutes of these meetings will appear i n the January number of this journal. The symposium papers will be published in The American Naturalist early i n 1925. 75 1'11E ANATOMICSL R E C O R D , VOL. 29, NO. 2 DECEMBER. 1924 76 AMERICAN SOCIETY OF ZO ~~LO G ISTS T E N T A T I V E PROGRAM The tmt;itive program sho\m the approxiinate half-day on which papers will appear. The announcement here sliould be checked against the data given in the program of the American Association for the Advancement of Science, which will show also the rooms to be occupied during the different sessions. The inf orrnation concerning the Genetics Sections 11as been furnished by their sccretary, Dr. D. F. Jones. All of the d a y sessions will be held in the Central High School Building. XIONDAY, DECE3fIRER 29 10.00 A . M . ~General and Comparative Physiology. 2.00 P.M. a. General and Conlparative Physiology (concluded) and Endocrinology. b. Genetics. 6.00 P . M . Informal conference on the teaching of Zoology. All those interested in the problems of teaching zoology with particular reference to the elpmentary college course a r e requested to meet f o r dinner at the City Club, 1320 G Street ($2.00 a plate). The topic under discussion will be the aim of teaching in the elementary courses. This will be briefly discussed by R. A. Budington, E. G. Canklin, A. F. Shull, and C. P. Rigerfoos. General discussion will follow. This conference was initiated and arranged by H. S.Colton. All interested zoologists are invited. 9.00 p.iv. Biological Smoker, National Research Building. TUESDAY, DECFXUER 30-CENTRAL 9.00 A.M. HIGH SCHOOL a. Miscellaneous. Cytology. Embryologg. Comparative Anatomy. b. Genetics. 2.00 P.M. Evolution. 2.30 P.M. Address: Edward L. Rice, retiring Vice-President of Section F. 3.23 P.M. Business session of Section F. 3.30 P.X. Business session of Zoologists. 4.30 P.N. Inspection of exhibits. Sec,tion X Iioltls its annual program a t this time. TENTATIVE PEOGRAM WEDNESDAY, DECEMBER 31-cENTRAL 9.00 2.00 A.M. P.M. 7.00 P.M. EIIGH SCHOOL a. Protozoology. Parasitology. b. Genetics. Symposium. Sex determination and sex differentiation. Sex determination and sex differentiation in the higher plants. Jolin H. Scliaffner, Ohio State University, representing the American Society of Plant Physiologists. Sex in relation to chromosomes and genes. Calvin B. Bridges, Columbia University. Sex and tlie parthenogentie bi-sexual cycle. A. Franklin Shull, University of Michigan. The problem of sex differentiation. W. W. Swingle, Yale University. Sex determination and differentiation in birds and mammals. Carl R, Moore, University of Chicago. Zoologists Dinner, IIotel Raleigh (headquarters hotel). All biologists are inritecl to attend. The dinner address will be given by M. F. Guyer, retiring President of the Society. THURSDAY, JANUARY CENTRAL HIGHSCHOOL 10.00 A.M. 77 Joint meeting with Ecological Society of America.