14 
bulletin of the bureau of fisheries. 
pointed, lower jaw slightly projecting, not usually included in the upper; maxillary extending to below 
anterior edge of pupil, its width 3 in its length, supplementary bone 3 in its length. Very minute 
teeth on tongue, none elsewhere. Scales moderate, not firmly attached, nearly equal in size posteriorly 
above anal, but not quite to those above tip of pectoral; lateral line nearly straight. Dorsal inserted 
midway between snout and caudal, its longest ray 1.66 in head; adipose fin moderate, measured from 
insertion to tip 4 in head, its height 9; anal concave, its longest ray 2.5 in head; ventral length 1.62 in 
head, its scale 2.5 in ventral length; pectoral short, reaching less than halfw r ay to insertion of ventrals, 
its length 2.33 in distance between pectoral and ventrals. 
Color in spirits dark; a dark blue shading under the scales dorsally, silvery laterally and colorless 
ventrally; dorsal darkened on distal end; caudal dark, edged with darker, anal, ventrals, and pectorals 
nearly clear. 
Fig. 7. — Leucichthys ontariensis Jordan & Evermann, new species. (Drawn from a specimen 13 
inches long, collected in Lake Ontario off Deseronto. Ontario.) 
This species is intermediate between sisco and artedi , differing from the latter chiefly in the greater 
elongation of the body and the relatively shorter pectoral fin. It is claimed by fishermen that a mesh 
of 2^4 inches is required for these fishes, w'hile 3^ is adequate for the capture of artedi or eriensis. 
Reed & Wright a say that this fish, which they identified as L. osmeriformis, is taken in Cayuga 
Lake in fairly large numbers, but that it is not as common as formerly. They were informed by old 
fishermen that it has never been abundant since the introduction of the alewife, which occurred about 
1872, or earlier. 
Comparison oj specimens oj Leucichthys ontariensis from Deseronto. 
Length without caudal 
Dorsal rays 
Anal rays 
Scales 
Scales between occiput and dorsal fin 
Branchiostegals 
Gillrakers 
Comparative measurements:^ 
Head 
Depth 
Caudal peduncle, length from anal to first of caudal 
Caudal peduncle, depth 
Eye 
Snout from eye '. 
Interorbital space 
Maxillary length from tip of snout 
Snout to occiput 
Ventrals to pectorals 
Pectoral length in pectoral-ventral distance 
Pectoral length 
Ventral length 
Dorsal height 
Adipose length 
Anal height 
Specimen no . 
mm. 
495 
492 
4918 
300 
300 
310 
10 
10 
1 1 
1 1 
1 1 
13 
9-76-8 
8-72-7 
9-77-7 
35 
3 i 
35 
9 
10-8 
9 
14+27 
16 + 29 
16 + 29 
0. 22 
0.21 
0. 22 
. 28 
. 24 
. 28 
. 095 
. 11 
. 09 
.08 
.08 
. 09 
• 05 
• 05 
- 05 
. 06 
• 05 
. 06 
. 06 
. 06 
. 06 
■ 075 
. 07 
- 07 
. 15 
. IS 
- 15 
• 34 
• 34 
- 37 
2-33 
2.33 
2. 66 
. 14 
• is 
- 15 
• 14 
• 15 
- 15 
. 1 4 
. 14 
• 15 
• 055 
. 065 
. 06 
.08 
. 08s 
. 10 
a The vertebrates of the Cayuga Lake basin, New York, by Hugh D. Reed& Albert H. Wright, Proceedings American 
Philosophical Society, vol. xlviii, no. 193, 1909, p. 398. 
& Measurements in hundredths of body length unless otherwise specified. 
