AUTHOR’S ABSTRACT OF THIS PAPER ISSUED 
BY THE BIBLIOGRAPHIC SERVICE, FEBRUARY 24 
STUDIES ON THE OVARY OF THE SPERMOPHILE 
(SPERMOPHILUS CITELLUS TRIDECEMLINEATUS) 
WITH SPECIAL REFERENCE TO THE CORPUS 
LUTEUM! 
DELLA DRIPS 
Mayo Foundation, Rochester, Minnesota 
Division of Experimental Surgery 
TWENTY-NINE FIGURES 
CONTENTS 
LLNS IRS s RSS os SEG AN Sy les ao ke. al gala ce oe lane te te ge eae ae Se Pe 117 
The ovarian cycle. A. Material and methods. B. Histologic descriptions 
of ovaries at consecutive intervals of the annual cycle. 1. The ovary of 
the early fall. 2. The ovary of the late fall. 3. The ovary of the early 
spring. 4. The ovary of early pregnancy with corpora lutea of the red 
granule stage. 5. The ovary of the middle of pregnancy with its char- 
acteristic corpora lutea. 6. The ovary at parturition with its char- 
acteristic corpora lutea. 7. The ovary of July with corpora lutea of 
the lipoid stage. 8. The ovary of the late summer with corpora lutea 
TEE, RETEST 011 | LN pala eG + Coe 2 ie oe a SOY a Oe eer eS 126 
Experimental studies. A. Effects of the removal of the uterus on the 
ovaries. 1. In non-pregnant spermophiles. 2. In pregnant sper- 
mophiles. B. Effects of the removal of both ovaries on the uterus. 1, 
In non-pregnant spermophiles. 2. In pregnant spermophiles. C, 
Effects of the removal of one ovary. 1. In non-pregnant spermophiles. 
2. In pregnant spermophiles. D. Effects on the remaining ovary of the 
removal of one ovary and the uterus in pregnant spermophiles. E. 
Studies on the normal bursting of follicles and the formation of corpora. 
lutea. F. Studies on ovulation, fertilization and corpora lutea forma- 
Summary and Discussion. A. Summary of the results obtained from the 
histological and experimental studies. B. Conclusions as to the func- 
tions of the corpora lutea in the ovaries of spermophiles............... 160 
LITERATURE 
The first papers written on the corpus luteum of the ovary had 
to do largely with its formation, particularly with the origin of 
the luteal cells. Were these cells connective-tissue elements 
1 Thesis for degree of Master of Science, University of Minnesota (Mayo 
Foundation, 1917). 
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