THE OVARY OF THE SPERMOPHILE 157 
Experiment 279-16 (spermophile 314). Captured May 1, 1916. 
Weight, 100 grams. Operated on May 5, 1916. The left ovary and 
the uterus were removed. 
Gross observations. It is impossible to recognize any fetuses in the 
uterus. 
Sacrificed May 18, 1916. Weight, 112 grams. 
Gross observations. The right ovary appears to contain corpora 
lutea. Everything in the abdomen is in excellent condition. There 
are no adhesions. 
Microscopic observations of the ovaries. Right ovary: fixative, 
formalin zenker; stains, acid fuchsin and methyl green, Weigert’s cop- 
per-chrome-hematoxylin, and hematoxylin and eosin. The left ovary 
was lost. The right ovary shows no pathology. It contains two 
corpora lutea which measure about 0.8 mm. x 0.8 mm. They seem 
to have reached their normal development for eighteen days. The 
number of red granules might have been slightly less than normal, but 
they are much more abundant still than the lipoid droplets. There is 
a well-developed connective-tissue framework and network of blood- 
vessels throughout the luteal body. As there are only two corpora 
lutea in this ovary, several follicles have had room to mature. Two of 
these show atretic changes. 
Experiment 292-16 (spermophile 327). Captured May 4, 1916. 
Weight, 130 grams. Operated on May 6, 1916. The right ovary and 
uterus were removed. 
Gross observations. There are six swellings in the right horn of the 
uterus and four in the left, 8.5 mm. in length. 
Sacrificed May 31, 1916. Weight, 170 grams. 
Gross observations. The left ovary is found embedded in a mass of 
fat, but the blood supply to the ovary seems intact. 
Microscopic observations of the ovaries. Right ovary; fixative, 
formalin zenker; stains, hematoxylin and eosin, Weigert’s copper- 
chrome-hematoxylin. Left ovary: fixative, acetic osmic bichromate; 
stain, acid fuchsin and methyl green. The right ovary contains six 
corpora lutea, measuring 0.6 mm. x 0.7 mm. They are of the red- 
granule stage. There is no lipoid. The mass of blood in the center is 
fairly well organized. The connective-tissue framework and network 
of capillaries are fairly well developed. The left ovary contains six 
corpora lutea which measure 0.7 mm. x 1.1 mm. in diameter. They 
have developed very normally, although not quite as rapidly as their 
controls. The red granules are still very numerous and there is scarcely 
any lipoid present. The connective-tissue framework and the blood- 
vessel network are very well developed. 
Experiment 295-16 (spermophile 330). Captured May 4, 1916. 
Weight, 116.5 grams. Operated’‘on May 6, 1916. The right ovary 
and uterus were removed. 
Gross observations. There are five swellings in each horn, all about 
5.5 mm. in length. 
Sacrificed May 26, 1916. Weight, 130 grams. 
