16 
4 robust kangaroos (ilfacropws robiistus), March, June, July, 
November. 
7 silver pheasants (Gennseus nydhemerns), May 12th, 
2 golden plieasants {Chrysolophus pictus), May 17th. 
4 Amlierst's pheasants {C. amherstise), May 27th. 
6 wild turkeys {Meleagris gallopavo), June 8th. 
6 scaly lizards (Sceloporiis poinsetti), July 11th. 
13 Marcy's garter snakes {Eidsenia marciana), August 27th. 
2 prairie rattlesnakes {Sistrurus catenahts) , September 6th. 
Destruction of newly-born young by the mother is usual 
among bears, and. the hybrids mentioned above were killed 
almost immediately after birth. The cubs of the black 
species were left in strict seclusion and were not even seen 
by any person except the regular keeper ; they were tended 
by the mother from February 6th, the date of birth, until 
February 17th, and it was hoped that they would be success- 
fully reared, but on that day they also were destroyed. 
The pathological investigations conducted by Dr. Penrose 
and Dr. White have been continued, and a report of their 
observations is printed herewith. An important outgrowth 
of this work has been a series of experiments to determine 
the hygienic effects upon many tropical and subtropical 
mammals of free access to fresh air, and of exposure to 
variations of temperature greater than those usually per- 
mitted in zoological gardens. A number of monkeys 
belonging to the African genera Papio and Cercopithecus 
were placed in a cage, movable upon rollers, which was run 
out of doors on the south side of the Monkey House each 
day during the winter, except in heavy storms, for periods 
ranging from ten minutes in very cold, to five hours in 
moderate weather. The lowest temperature which they 
encountered was 26° Fahr. These monkeys have remained 
in perfect health, with the exception of one, which died from 
a disease of the liver in no way related to the exposure. 
A pair of yellow baboons [Papio cynocephalus) were 
allowed to remain out in the open cage which they had 
occupied during the summer, the shelter being a kennel at 
