THE DUCTLESS GLANDS 335 
many areas of small and a few of large hemorrhage. Cartilaginous 
deposit is occurring at some places in the field showing the latter tjpe 
of sarcoma. Section of lung contains a large sarcoma nodule. The 
cells consist of round cells without the large cartilage-like cells found 
in the original tumor mass. 
Coypu {Myocastor coypus) t. Sarcoma of right thyroid. The 
thyroids occupy a position deep in the neck upon the anterior vertebral 
muscles, the left higher than right, being up to level of top of thyroid 
cartilage. Only a half-inch of lower pole of right remains and it is 
like the left which is soft, deep brown-red, delicately lobulated, closely 
bound to trachea but movable in fascia. It is 30 x 10 x 3 mm. The 
upper part of the right organ is occupied by, or at least within the 
same capsule as a 25 x 15 x 10 mm. encapsulated, pink mass with many 
small vessels on its exterior. It is soft and on section the surface is 
mushy, of gray-pink-yellow, and seems to have an exceedingly delicate 
trabecular network. Posterior and superior to this, lying near the 
salivary glands but back of them is a similar mass 15 x 12 x 5 mm. Still 
another lies anterior to what remains of the right thyroid and is about 
8x5x4 mm. The adrenals are 30 x 13 x 8 mm. slightly hard and not 
unlike a long kidney in ai-rangement. The cortex is wide, regular, 
brown or tawny, the medulla rich in vessels and deep brown. His- 
tological section of thyroid is an almost completely cellular mass with 
here and there delicate and incomplete trabeculations. Small blood 
vessels are numerous and consist of a delicate line Avith a cell nucleus 
here and there, that is no true wall. It seems as if the blood channels 
were simply regular spaces through the cell mass. The cell type is 
mononuclear with definitely acidophilic " granuloid " somewhat vacuo- 
lated protoplasm. The nucleus is almost without exception eccentric, 
rather poor in chromatin but in places diffusely staining. Mostly, 
however, the nuclear skein is in spots or threads and fairly dense 
around margins, therefore not unlike a thyroid cell and a plasma cell. 
Here and there one finds compressed remains of thyroid acini. There 
is decided irregularity of size and shape in these cells. Its origin is not 
clear but this seems like a sarcoma of the thyroid. 
Undulated Grass Parrakeet {Melopsittacus undulatus) 6. Medul- 
lary carcinoma of thyroid. On opening the body a mass 10 x 6 x 4 mm. 
is found in the upper thoracic region on the right side. A similar 
mass measuring 5x3x2 mm. lies in similar position on the left side. 
They are identified as thyroid glands only from their position and 
from the numerous large vessels which radiate from them. An especially 
large vessel leads directly to the heart. Long axes extend anteroposteri- 
orly. The masses are of a firm gelatinous consistency, the color of carpen- 
ters glue in lower portions, shading off to a dirty canary yellow above. 
They have a translucent appearance in lower portions. The surface 
is fairly smooth, adherent latterly and posteriorly. They are well 
circumscribed. At one end of the histological section thyroid tissue 
