116 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
spawning-ponds, it was found extensive losses had been sustained and, 
to compensate, 900 fish, weighing on an average about 0.3 pound, were. 
purchased. It was believed that missing fish had been stolen, or pos- 
sibly destroyed through cannibalism. 
Eggs were obtained from three sources, the ponds of the station, 
Uneva Lake, and the private ponds of Dr. John Law. The collections 
were satisfactory in number, but inferior in quality. The first were 
taken October 28, the total collections from the station ponds being | 
268,800, of which 205,000 were obtained during November. Nine trips 
were made to Lake Uneva, where 70 adult trout, weighing nearly 3 
pounds each, and 153,600 eggs were collected in November. The owners 
of the fish, Messrs. Searl and Lazenby, by way of return, received 25 
per cent of the fry in the summer following. After Dr. Law’s hatchery 
had been filled with eggs, he allowed the remainder to be taken by the 
United States Fish Commission, and in December 50,000 were secured. 
Both those eggs from. Uneva Lake and Dr. Law’s establishment 
proved to be of poor quality, 50,000 from the former place having been 
discarded by December 31, and 40,000 from the latter by February 28. 
The losses were attributed to defective fertilization. It is, moreover, 
believed that the prolonged period of incubation, on account of low 
temperature of the water, is of great disadvantage, eggs not being 
hatched till the end of five months. The temperature throughout this 
period remained at 34° F. On January 31 the eggs in Dr. Law’s 
hatchery, in a temperature of 43° to 44°, were nearly all hatched, they 
having been taken in the month of November. 
Black-spotted trout.—The results with this species in small breeding- 
ponds have not been satisfactory. Out of about 4,000 adults captured 
and confined at the station during the four preceding years, but 800 
were this year surviving, and it is believed that the only source of 
dependence for eggs will be on wild fish in open streams and lakes of 
this region, the most inviting field being Twin Lakes. Eggs collected 
amounted to 118,600, all at the station except 18,000 from Sweetwater 
Lake. Attempted collections at the latter place were in conjunction 
with the State fish commissioners of Colorado. The first eggs of the 
season were taken May 25, collections for that month amounting to 
nearly 35,000, and in June about 83,000. A shipment of 20,000 was 
made to the World’s Fair, Chicago. 
Rainbow trout.—In June there were taken from fish confined in the 
ponds 6,200 eggs, of which 5,665 remained on hand June 30, 1893. 
Loch Leven trout.—Eges to the number of 75,000 were received from 
the Northville Station by express freight February 14. On unpacking 
they appeared to be in good condition, but on the succeeding day as 
many as 10,000 hatched prematurely. The hatching of the remainder 
was normal, but before the feeding stage was reached about 65 per cent 
perished. 
In February the mean air temperature was 15°, with a snow-fall of 
5$ feet. This remained on the ground to such an extent that in the 
