DURING THE FISCAL YEAR 1907. rs 
Eggs are distributed only to state hatcheries or to applicants who 
have hatchery facilities. 
The varying usage in the classification of young fish as to size has 
caused such confusion and difficulty that the Bureau has adopted 
uniform definitions, as follows: 
Fry=fish up to the time the yolk sac is absorbed and feeding begins. 
Advanced fry=fish from the end of the fry period until they have reached a length 
of 1 inch. 
Fingerlings=fish between the length of 1 inch and the yearling stage, the various 
sizes to be designated as follows: No. 1, a fish 1 inch in length and up to 2 inches; 
No. 2, a fish 2 inches in length and up to 3 inches; No. 3, a fish 3 inches in length and 
up to 4 inches, etc. 
Yearlings=fish that are 1 year old, but less than 2 years old from the date of hatch- 
ing; these may be designated No. 1, No. 2, No. 3, etc., after the plan prescribed for 
fingerlings. 
SPECIES CULTIVATED IN 1907. 
The following full list of species that the Bureau was concerned 
with in 1907 includes some 50 fishes and the lobster. Except as 
otherwise indicated by footnotes, all were artificially propagated. 
THE CATFISHES (SILURID): 
a Spotted cat, blue cat, channel cat (Ictalurus punctatus). 
@ Horned pout, bullhead, yellow cat (Ameiurus nebulosus). 
Marbled cat (Ameiurus nebulosus marmoratus). 
THE MINNOWS AND CARPS (CYPRINID): 
b Carp (Cyprinus carpio). 
¢ Goldfish (Carassius auratus). 
¢Tench (Tinca tinca). Cultivated varieties, green tench and golden tench. 
¢ Ide (Leuciscus idus). Cultivated variety, golden ide. 
THE SHADS AND HERRINGS (CLUPEID‘): 
Shad (Alosa sapidissima). 
THE SALMONS, TROUTS, WHITEFISHES, ETC. (SALMONID2): 
Common whitefish (Coregonus clupeiformis). 
Lake herring, cisco (Argyrosomus artedi). 
Chinook salmon, king salmon, quinnat salmon (Oncorhynchus tschawytscha). 
Silver salmon, coho (Oncorhynchus kisutch). 
Blueback salmon, red-fish, sockeye (Oncorhynchus nerka). 
Humpback salmon (Oncorhynchus gorbuscha). 
Steelhead, hardhead (Salmo gairdner?). 
Rainbow trout (Salmo irideus). 
Atlantic salmon (Salmo salar). 
Landlocked salmon (Salmo sebago). 
Yellowstone Lake trout, cut-throat trout, black-spotted trout (Salmo lewisi). 
Colorado River trout, blackspotted trout (Salmo pleuriticus). 
Golden trout (Salmo roosvelti). 
@ Artificially propagated and also collected. 
b Propagated principally as food for other fishes. 
¢ Introduced species, propagated for ornamental purposes (not distributed). 
