134 
ZOOLOGICAL SOCIETY BULLETIN 
Se 
LAKE ERIE WHITEFISHES, NEARLY EIGHT YEARS OLD 
Hatched in the Aquarium, January, 1913. 
There are about 130 remaining. 
Photographed by Elwin R. Sanborn 
Prof. Reighard of the University of Michigan, 
in studying whitefishes of the Great Lakes under 
the auspices of the U. S. Bureau of Fisheries, 
has requested specimens of our whitefishes, or 
scales taken from them at intervals during the 
year. The Aquarium being well supplied, will, 
of course, contribute to the carrying on of such 
investigations. 
The scales of fishes in captivity may not, how- 
ever, show the seasonal changes found in wild 
fishes, although the fresh water in which they 
live varies from 386 degrees in winter to 75 de- 
grees in summer. 
It is not easy to raise young whitefishes. 
The specimens shown in the accompanying pho- 
tograph were carried through the critical period 
of infancy by feeding on herring roe and the 
larvae of mosquitoes. 
Never having enjoyed their natural live food, 
these fishes are undersized notwithstanding their 
age. One of the smaller specimens before me 
measures ten and one-half inches and weighs 
only five ounces. Many of them, however, are 
from twelve to fifteen inches in length and must 
be decidedly heavier.—C. H. T. 
Recenr ENLARGEMENT OF EXHIBITION 
Tanxs.—The work of enlarging the glass- 
fronted tanks located on the main floor of the 
Aquarium, which has been going on intermit- 
tently for three or four years, is now completed, 
with the exception of four tanks which, on ac- 
count of their position, cannot be made larger. 
Most of the work of rebuilding the tanks has 
been done by the employes of the Aquarium as 
opportunity afforded, without cost to the City 
except for cement and other materials. 
A donation of $2,540 from the Zoological 
Society has provided for the completion of the 
improvement and the eleven tanks just finished 
by the contractor have already been stocked with 
fishes. 
The enlargement of the ground floor series of 
tanks has greatly increased the space for ex- 
hibits and each tank now contains about three 
times as many specimens as it formerly held. 
The Aquarium has at present a larger collec- 
tion than ever before and the fact is commented 
upon by many of its numerous visitors. The 
ground floor tanks, originally constructed with 
their rear walls four feet back from the glass 
