40 
3951. Lion cub (Felis leo). Congenital cystic uterus. 
The only abnormality found is in connection with the 
internal genitalia. The vagina 50 mm. long, uterus 
measures 23 mm. long, horns of uterus each 90 mm. 
long. Diameter of uterus measures 10 mm. in both body 
and cornua, the latter being distended by clear watery 
fluid. They are symetrically curved downward. They 
show no adhesions or obliteration of os uteris to account 
for fluid retention. The probe is readily passed from 
the vagina to end of uterine horns. Vagina is patulous 
through its whole course. Ovary and tube normal. 
A Note upon the Placentation of the Common 
Raccoon (Procyon lotor). 
On examination of the placenta and foetus of the 
animal there was found a feature apparently normal 
but not previously noted among Carnivora. At a 
point on the uterine surface of the zonary placenta just 
opposite the insertion of the umbilical cord, there occurred 
a punched out circular gap in the continuity of the 
placenta, 1 cm. in diameter. The hole was filled with 
organized blood clot, stained dull yellow about the edges 
evidently with hematoidin. On the uterine surface of 
the placenta there was found a deep red nipplelike bulb 
of tissue, apparently blood clot enclosed within a delicate 
membrane. The membrane sprang from the entire cir- 
cumference of the gap in the placenta and when filled 
with blood clot formed a pouch 1 cm. in diameter and 
about 15 mm. in length. This pouch protrudes into the 
amniotic cavity. On microscopic examination the cover- 
ing membrane was found to be chorion, the villi markedly 
developed, interlacing and forming the bulk of the tissue. 
Organized blood clot was found to fill the pouch of 
membrane so formed. Reference to the literature of the 
subject showed that Bischoff (Sitz. bericht. Akad. 
Wissensch. Miinchen 1865) had reported a similar 
condition found in the stone marten (Mustela foina) 
European otter {Lutra vulgaris) and weasel (Mustela 
vulgaris) . 
