36 U. S. BUREAU OF FISHERIES. 
The collecting operations for both lake trout and whitefish were 
conducted in American and Canadian waters under the same co- 
operative agreement that was effective last season. In Canadian 
waters the work was handicapped by lack of a suitable boat, making 
it necessary to plant on the spawning grounds immediately after 
fertilization 29,650,000 of the eggs taken at Deseronto and Big 
Island. Canadian hatcheries received 30 000,000 of the eggs ob- 
tained, in accordance with the terms of the agreement ; 29 300,000 
were turned over to hatcheries of the New York Conservation Com- 
mission and 1,000,000 were diverted to the Washington exhibit. 
The remainder were incubated at the Cape Vincent station and the 
resulting fry planted in Lake Ontario waters. Egg collections of 
cisco (lake herring) from Ontario waters totaled 317,200,000, of 
which 73,200,000 were obtained in Canadian waters at Deseronto and 
Bygotts Point. The fisheries authorities of Pennsylvania and New 
York received 104,410,000 and 65,000,000, respectively; 17,100,000 
fertilized eggs were planted on the spawning grounds, and the fry 
hatched from the remainder were returned to Lake Ontario waters. 
During the spring a small number of brood yellow perch were 
obtained from trap nets set in the St. Lawrence River, and from the 
15,000,000 eggs thus secured 11,000,000 fry were hatched and re- 
turned to the St. Lawrence River. A consignment of 8,000,000 eyed 
pike-perch eggs received from the Lake Champlain hatchery yielded 
for distribution 7,970,000 fry of excellent quality, an usually high 
percentage. In addition to the commercial species enumerated 
150,000 rainbow-trout eggs from the bureau’s Virginia station and 
approximately 450,000 ‘brook-trout eggs from commercial dealers 
were incubated and the fry distributed to applicants in New York 
State. 
A boat suited to the needs of the station was obtained by transfer 
from the Navy, but because of the time consumed in making needed 
repairs to motors was not available for service during the past 
season. When fully equipped, this boat will add much to the pro- 
ductivity of the station, being particularly valuable in connection 
with the whitefish and cisco work in Canadian waters. 
SWANTON (VT.) SUBSTATION. 
[A. H. DINSMorRE, Superintendent. ] 
The work at this point is conducted cooperatively with the State 
of Vermont. During the operating season of 1921, eke from 
March 2 to May 10, pike-perch eggs to the number of 112,312,500, 
also 43,950,000 yellow-perch eggs, were secured for incubation. The 
winter being unusually mild, the Missisquoi River was open at an 
early date. Nets were set during the first part of March and hauled 
at frequent intervals at the various points to anticipate the presence 
of fish. The a st pike perch were taken at Sandy Point March 25 and 
at Campbell’s WeApril 4. Three trap nets were in operation at the 
mouth of the iGbr, but the results from their use would not appear 
to warrant their continuance. All fish taken were immediately trans- 
ferred to the inclosure for ripening, but because of low water stages, 
resulting in an improper circulation of water through the inclosure, 
the mortality was high, and all brood fish on hand were released on 
