128 
ZOOLOGICAL SOCIETY BULLETIN 
produce albinistic progeny. In his extensive 
studies of the original wild bison of the plains, 
Dr. Hornaday found no records of real albinos 
from among those now extinct millions, nor does 
he remember from his personal investigations 
of living and mounted specimens having ob- 
served an indication of even partial albinism ex- 
cept one pale yellowish-gray specimen, distinct- 
ly off color from the normal example. 
Among the birds, albinism appears to be fair- 
ly frequent among numerous orders containing 
species both large and small. 
Albinism is fairly frequent among the reptiles, 
although the writer has never observed an albino 
lizard, nor a perfectly albinistic crocodilian. We 
have exhibited two albino alligators, one of 
which was largely pure white, but a few black 
ALBINO INDIAN PEAFOWL 
authentic sources. We hear of occasional al- 
bino monkeys, also of deer, but of the rodents 
of the 
larger and more important species that are not 
particularly abundant. 
dents, albinism appears to be extremely rare in 
certain families and genera. It is fairly fre- 
quent among the bushy-tailed tree squirrels 
(Sciurus), but appears infrequent among the 
chipmunks, (Z'amias), and the spermophiles 
(Spermophilus ). 
we have constant records among some 
Even among the ro- 
It is by no means rare with 
particularly 
-yet rare with the prairie-dog, 
the American 
abundant type, 
which is very abundant over large areas and is 
readily With the 
woodchuck, albinism is very frequent. 
exhibited at least a dozen in the Zoologi- 
cal Park. There appears to be no doubt that 
certain species of mammals seldom or never 
porcupine—a not 
related 
We have 
observed. closely 
ALBINO RACCOON 
