32 
tinct but not joined septa. Within these areas are illy 
defined acini containing round, cuboidal and irregular 
cells fitted with deeply staining small nuclei. Some of 
the cells are applied to the membrane, others are loose. 
A distinct basement membrane is often difficult to see, 
thus suggesting an uncontrolled growth out from the 
true walls. No colloid seem and none of the orderly 
packing of fetal thyroid. This is to be considered either 
as an excessive hyperplasia or as a carcinoma; it re- 
sembles some of the malignant adenomata and carci- 
nomata described by Wilson. The mediastinal mass 
is fairly well defined thymus tissue with HassaH's bodies 
and a very rich blood supply. Some of the arrangement 
suggests sinuses in lymph tissue and proliferation is 
going on around their margins. Follicular arrangement 
also simulated. 
Undulated Grass Parrakeet (Melopsittacus undulatus) 
9 . Carcinoma of ovary. 
Grivet Monkey (Cercopithecus sabceus) 9. Adeno 
carcinoma of head of pancreas. 
Observations by Dr. E. A. Schumann upon Interest- 
ing Conditions found in the Female Genital Tract: 
American Otter (Lutra canadensis). Cystic ovaries 
and Hydrometra. The body of the uterus is normal 
although somewiiat atrophic. Both cornua are the seat 
of extensive cystic change. The walls of the cornua 
are greatly thinned and their diameter about six times 
normal size. There is a distinct torsion about the middle 
of each uterine cornua and many distinct blood vessels 
course over the surface. The left ovary is the seat of 
a follicular cyst 5 cm. diameter and the flattened out, 
almost obliterated fallopian tube may be seen spread 
out over the inner surface of the cysts. The right ovary 
is converted into a cyst 2 cm. diameter. The right tube 
is also thinned out and obliterated. Both uterine cornua 
and ovaries contain clear serous fluid. 
Malaccan Porcupine (Hystrix longicauda). Scirrhous 
carcinoma of left mammary gland with metastases to 
