Appendix I 
Purchase and Maintenance of Squirrel Monkey 
It is important to find a reliable animal dealer who will regularly provide 
well-nourished animals with good coats. It is our experience that animals 
weighing appreciably less than 500 grams are either immature or sickly. 
Our experimental animals are kept in cages that are 28" long, 26" high 
and 18" wide. For purposes of climbing, cleanliness, and ease of inspection, the 
sides of cages are made of IJ/q'' stainless steel wire mesh. Usually no more than 
1 or 2 animals are kept in a cage. The animal room is maintained at an average 
temperature of 76°. Surplus animals are kept in large runs which have access 
to the out of doors during seasonable months. 
Exotic diets mimicing what the animals eat in the wild are not necessary and 
may even be deleterious. On the basis of over 10 years experience, it can be 
stated that the squirrel monkey can be maintained in good nutrition for periods 
up to several years on a standard diet of monkey chow (1). Ten to 12 soft 
biscuits (a biscuit weighs about 3.5 g. ) appear to satisfy the daily food require- 
ments of an average monkey. Favored foods such as grapes, bananas, and raw 
peanuts may be offered for purposes of training and taming. 
The squirrel monkey is highly resistant to bacterial infections ( 1 ) . We have 
had no cases of tuberculosis. A rare animal may go downhill and die with a 
nematode infestation. We have found that the condition of an animal’s coat 
and its weight are the best indicators of its condition. Consequently, animals 
under chronic observation are weighed once a week. The addition of tetracy- 
cline (Terramycin) to the drinking water appears to be helpful if an animal 
develops loose stools. We do not use vermifuges and only occasionally give 
supplemental doses of vitamins. Antibiotics are not generally used following 
surgery. 
Until one becomes adept at handling squirrel monkeys, a light fishnet Ls 
useful for apprehending them in the cage. Leather gloves should be worn at 
all times to avoid lacerations by their sharp teeth. The squirrel monkey re.sponds 
well to gentle handling. 
The greatest asset in the maintenance of animals is an animal caretaker who 
is solicitous of their needs and who by his voice, bodily movements, and methods 
of handling helps dispel fear. 
Appendix II 
Additional References 
Akert, K., Potter, H. D. and Anderson, J. W. The subfornical organ in mammals. 
I. Comparative and topographical anatomy. /. Comp. Neurol, 1961, 116: 1-13. 
Benjamin, R. M. and Welker, W. I. Somatic receiving areas of cerebral cortex 
of squirrel monkey (Saimiri sciureus). /. NeurophysioL, 1957, 20: 286—299. 
French, G. M. Performance of squirrel monkeys on variants of delayed response. 
/. Comp. Physiol. Psychol, 1959, 52: 741—745. 
Kliiver, H. Behavior mechanisms in monkeys. Chicago, U. of Chicago Press, 
1933,387 pp. 
Miles, R. C. Learning-set formation in the squirrel monkey. /. Comp. Physiol 
Psychol, 1951,50: 356-357. 
Miles, R. C. Color vision in the squirrel monkey. /. Comp. Physiol. Psychol, 
1958, 51: 328-331. 
Miles, R. C. and Blomquist, A. J. Frontal lesions and behavioral deficits in 
monkey. /. Neurophysiol, 1960, 23: 471—484. 
Retzius, Gustav. Cerebra simiarim illustrata. Das Affenhirn in bildlicher Dar- 
stellung. Jena, Gustav Fischer, 1906, 24 pp. 
Welker, W. I., Benjamin, R. M., Miles, R. C. and Woolsey, C. N. Motor effects of 
stimulation of cerebral cortex of squirrel monkey (Saimiri sciureus). /. Neuro- 
physiol., 1957, 20: 347-364. 
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