GREAT LAKES COREGONIDS 



475 



to state what distinctive features the race possessed. It is certain, however, that in 

 point of absolute size attained it far exceeded hoyi, and the shape of the body, to 

 judge from the specimen and from representatives of the species in other lakes, 

 is more ovate in side view in nigripinnis prognathus and elliptical in hoyi. 



GEOGRAPHICAL DISTRIBUTION 



All my data on the occurrence of hoyi in Lake Ontario are given in Table 64 

 and are shown platted on a chart of that lake in Figure 7. For the most part they 

 are gathered from the use of 2% and 2% inch gill nets set by me from the various 

 ports on the lake, but some observations on the species also have been made from 

 3-inch herring nets and4^-inch whitefish nets lifted from these ports. As specimens 

 were found in the experimental nets out of every port from which they were set, and 

 as the ports visited are widely scattered along the lake's shores, it is safe to conclude 

 that hoyi occurs throughout the lake where suitable ecological conditions obtain. 



BATHYMETRIC DISTRIBUTION 



It has previously been stated that the only sources of data on the occurrence or 

 distribution of any of the deep-water Leucichthys were the experimental nets referred 

 to in the preceding paragraph. These nets were set for the most part only at such 

 depths at which two or more species might be expected to occur, and no efforts were 

 made to determine the depth range of any form. The records show small individuals 

 ensnarled in the 4%-inch whitefish nets off Bronte, Ontario, in 16 fathoms on June 

 30, 1921 (record 3), and gilled specimens in the 23^-inch nets off Wilson, N. Y., 

 in 20 fathoms on July 21, 1921 (record 18). These are the shallowest sets in which 

 any Leucichthys were observed by me in Lake Ontario. The deepest water explored 

 by me was 70 to 75 fathoms, from which nets were lifted off Oswego, N. Y., on Sep- 

 tember 4, 1923 (record 10) and some Jioyi were present in the catch of these nets. 

 Records 7, 11, 13, and 17 show them to have occurred in nets lifted from depths of 60 

 to 65 fathoms out of Sandy Pond, Sodus Point, Charlotte, and Wilson, N. Y. It 

 may be said, then, that the species ranges between 16 and 75 fathoms, but the figures 

 do not set the limits of the zone of distribution. 



RELATIVE ABUNDANCE 



From many of the experimental sets made during the summers of 1921 and 

 1923 but few fish were taken, due, no doubt, in part, at least, to want of experience 

 with conditions out of the various ports rather than to their actual rarity in the 

 neighboring waters; but from most of those lifts that could be considered profitable 

 from the fisherman's point of view the relative abundance of the species has been 

 tabulated. On June 25, 1921, and on July 16, 1921, 5 miles north of. Wilson, N. Y., 

 in 50 fathoms, and on July 19, 1921, 6J^ miles N. by W. W. in 65 fathoms (records 

 15, 16, and 17), bloaters constituted 60, 90, and 25 per cent, respectively, of the 

 catch. On July 4, 1921, 7 miles north of Braddock Point Light in 65 fathoms (record 

 13), 66 per cent of the fish taken were bloaters; and on July 12, 1921, 8}^ miles 

 NNW. of Sodus Point, N. Y., in 60 fathoms (record 11), they comprised 75 per 

 cent of the lift. The species was not uncommon in lifts made on June 10 and 16, 



