55 
along very evenly, there is a reduction of cases among 
the primates. Formerly the numbers were made up 
chiefly from the Ateles and Cebus monkeys; in the past 
two years more raccoons and birds were affected. For 
this report we include a raccoon, a gazelle, a night mon- 
key, a baby yellow baboon (true rachitis) and the Weeper 
Cebus described above. There is also a noteworthy 
difference in the degree of deformity in the past two 
years. When the larger animals are affected, they live 
long enough to sink into curious attitudes producing very 
marked shortening and deepening of the thorax. 
I have tried, separately and combined, calcium lacto- 
phosphate and adrenal extract. One pair of Anubis 
Baboons were noted upon arrival to have slightly curved 
tibiae. They were started immediately upon treatment 
and continued for six months. One died very shortly 
after stopping the medicine, the other living about one 
year with ever-increasing deformity. These animals 
were by no means fully developed, yet their pathological 
condition was one of excessive bone absorption. In 
only one of our cases has there been any perceptible 
disease of the adrenal or ovary. 
I gather the impression, only from the youth of many 
specimens and from the early involvement of long bones, 
that we are dealing with some condition preventing 
proper calcification and at the same time disturbing the 
regulation of normal bone absorption. The laboratory 
records do not throw any light upon the effect of length 
of captivity, age, sex or breeding. 
Since March 1st, 1906, the records of osteomalacia 
show the following : — 
Ateles Monkeys, 6. 
Capucin Monkeys, 4. 
Yellow Baboons, 1. 
Night Monkeys, 2. 
Birds, 5. 
Raccoons, 4. 
Gazelle, 1. 
