45 
pearance concerns the connective tissue. Ap- 
pearing in almost any part of the section, and 
bearing no regular relation to the epithelial ele- 
ments or the section in general, are areas of closely- 
packed, large spindle cells with hyperchromatic 
nuclei. In another place such spindle cells are 
arranged purposefully to form irregular capil- 
laries containing blood. A third appearance re- 
sults from a combination of the first two. Here 
there are acini, between which run blood capil- 
laries with remarkably rich and numerous em- 
bryonic lining cells. A section stained by Van 
Gieson's method proves that part of the intra- 
alveolar material is colloid. Every gradation 
can be made out in tint of this material, from 
pink to salmon orange. It is often very difficult, 
or impossible, to state whether a given blood- 
filled space is a blood vessel or an acinus with 
hemorrhage. In both structures the lining con- 
sists of flattened cells. In one there is the possi- 
bility of colloid, in the other of hematogenous 
hyaline, both with peripheral vacuolization. 
2783. Raccoon-like Dog {Canis procyonoides) : 
Hemorrhagic parenchymatous goitre. 
Both thyroids measure 4x3x2 cm. ; soft, resilient, 
with a dense gray capsule. The cut section shows 
cysts filled with blood separated by pale septa of 
soft tissue of varying thickness. There is one 
similar mass under the angle of the jaw which 
seemed like lymph node, but on section is like 
thyroid. Parathyroids were not found. 
The microscopical section is made up largely of 
slightly-enlarged acini, in most of which a slightly 
eosin-stained hyaline collection is found. There 
are a few cysts containing a thrombus and hem- 
orrhage. There are no typical colloid cysts. 
Some scars from old hemorrhages may be seen. 
There is much free blood in and between the acini. 
