L52Z DELLA DRIPS 
5mm.x5mm., and the third, 3mm.x2mm. Each swelling con- 
sists of a light-colored band surrounding a hard dark red mass. The 
same condition was found in all the other cases. Some of the pla- 
cental swellings with the fetuses have disappeared entirely, the others 
are degenerating. 
Experiment 333-16 (spermophile 362). Captured April 28, 1916. 
Weight, 168 grams. Operated on May 12, 1916. Both ovaries were 
removed. , 
Gross observations. The animal is in advanced pregnancy. The 
operation was difficult as there were so many large fetuses. No at- 
tempt was made to count the number for fear of disturbing them. 
Sacrificed May 20, 1916. Weight, 125 grams. 
Gross observations. The uterus appears about normal in color. 
There are three swellings in the left horn, 4mm. by 5 mm., and ten in 
the right horn, same size, dark red and hard. 
Experiment 355-16 (spermophile 375). Captured May 20, 1916. 
Weight, 143 grams. Operated on May 22, 1916. . Both ovaries were 
removed. 
Gross observations. The animal is in advanced pregnancy. The 
operation was performed with very little trauma, the fetuses not being 
removed from the abdominal cavity. The placental swellings were 
1.5 em. or more in length. 
Sacrificed May 26, 1916. Weight, 130 grams. 
Gross observations. The animal had aborted some time previously, 
perhaps twenty-four hours. There are seven placental sites in the 
right horn and two in the left, all 5 mm. x 6 mm. The uterus is 
normal in color. The placental swellings appear congested but not 
hard. They look very different from those previously described. 
Experiment 357-16 (spermophile 377) Captured May 18, 1916. 
Weight, 116 grams. Operated on May 22, 1916. Both ovaries were 
removed. 
Gross observations. The animal is in advanced pregnancy, the 
placental swellings measuring 2 cm. in length. The operation was 
performed with very little trauma, the fetuses not being removed from 
the abdominal cavity. 
Sacrificed May 25, 1916. Weight, 110 grams. 
Gross observations. The animal must have aborted shortly after 
the operation. There are three placental sites in the right horn and 
four in the left, 5 mm. by 4 mm. 
Experiment 309-16 (spermophile 344). Captured May 6, 1916. 
Weight, 120 grams. Operated on May 8, 1916. Instead of removing 
both ovaries, the left ovary was removed and the right tube ligated on 
the opposite side. 
Gross observations. The animal is pregnant, the placental swellings 
measuring 1.4 cm. in length. There are many of the latter in the left 
horn and only one in the right. 
Sacrificed May 20, 1916. Weight, 120 grams. 
