24 
animals, although apparently it does not lead to vascular 
dilatation. 
Dr. Weidman has continued to study the parasites and 
reports in the Journal of Parasitology, December 1916, a 
new species of arachnid, Cytoleichus penrosei. His report 
and that of Dr. Schumann upon the lesions of the genitalia, 
appear later. 
During the year the only other contribution made from 
the laboratory concerned a colonic pigmentation in a 
monkey, that is a fruit and vegetable eating animal, 
comparable to a form seen in human beings and ascribed 
to the action of an intestinal ferment upon certain proteins. 
This is being made the subject of further study. 
Many animals come to autopsy with a history of palsy 
or actual paralysis of the extremities, notably the hind 
legs and for which observation no adequate gross cause 
can be found. In a few cases a minor grade of nerve 
tissue degeneration has been observed and Dr. Cadwal- 
ader and I have discussed the possibility of a degenerative 
neuritis and myelitis in all such cases. This problem is 
now before us and we may learn something as to the 
causation of the disability and perhaps a clue as to its 
relief. It should be added that this loss of power is not 
confined to wild animals but is frequently seen in cats and 
dogs; in these animals it has usually but not ahvays 
been accompanied by finding worms in the muscles or 
intestinal canal. 
The museum has had 110 new additions, so that now 
900 specimens are on the shelves. For the past few 
months the brain of every valuable specimen has been 
removed, our collection numbering 61. We shall remove 
all brains until we have duplicates of every principal 
zoological division. Already we have arranged to supply 
material to Dr. S. W. Orton, of the Pennsylvania Hospital, 
who is making comparative studies of the gross and 
cellular construction of the cerebral cortex. This gentle- 
man will return half of the brain submitted and a draw- 
ing of the architecture of the other half. 
The following is a list of the animals dying during the 
