23 
York, which is thirty-six miles long and from one to two 
and one-half miles wide, that was planted with 18,000 
crayfish in 1878. The plant was made in two or three 
streams at one end of the lake, and for several years past 
the crayfish have been found in abundance from one end 
to the other of the thirty-six miles of water. A form of 
fish food that I have been and am specially interested in 
is the fresh-water shrimp, Gammarus fasczatus of Say, 
or perhaps more frequently called Gammarus pulex. 
We have three species of Gammarus in our ponds, brooks 
and rivers, and Prof. S. I. Smith says of them: ‘They 
probably breed throughout the spring and summer, as 
females taken at various times from March to August 
are found carrying eggs or young in various stages of 
development.” He infers that, as species allied to the 
fasciatus develop rapidly, they breed several times each 
season. When trout are found to have dark-red flesh 
with cream-like curds between the flesh flakes, it is a sure 
sign that the waters they inhabit produce crustacean food 
in abundance. 
I have transplanted shrimp in trout streams with the 
best results, but never have tried them in ponds. Cale- 
donia Spring Creek. on which one of the hatching stations 
of the New York Fish Commission is situated, is famous 
the country over for its well-conditioned trout and its 
abundance of fish food. The Castalia stream in Ohio is 
similar in character to Caledonia Creek, and the fish food 
in many respects is identical because of transplanting 
mosses and water weeds with accompanying insect and 
crustacean forms of life from the latter to the former. 
Prof J. A. Lintner examined a can of mosses and aquatic 
plants sent to him from Caledonia Creek after ‘his atten- 
tion had been called to the remarkable abundance of 
trout in the stream, abounding, it was believed, as in no 
other natural locality in the United States.” 
When the can was opened the mosses and plants 
swarmed with insect larve and crustaceans to such an 
