214 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Plate xxvri. Semotilus atromaculatus (Mitchill). Horned dace; Chub. 
The horned dace is found mostly in the smaller streams and bays tributary to the lake, where it 
reaches the length of a foot. It is often caught by the boys on hooks baited with angle- 
worms. The species is distinguished by a large; black spot on the anterior part of the dorsal 
lin. The male fish, in the breeding season, develops peculiar dermal protuberances on the 
head, whence the name “ horned dace.” 
Plate xxviii. Hiodon tergisus Le,Sueur. Moon-eye. 
This is a handsome fish, with a brilliant silvery color on the sides and green above. It has 
recognized game qualities, and takes the fly or baited hook with avidity. Feeds on minnows, 
insects, and crustaceans. It weighs 1 or 2 pounds, but is not generally esteemed as a food- 
fish. 
Plate xxix. Clupea pseudoharengus Wilson. Alewife; Branch herring. 
Plate xxx. Clupea sapidissima Wilson. Shad. 
Plate x'xxi. Clupea chrysocliloris (Eafinesque). Skipjack. 
Although not observed by the writer in Lake Ontario, its occurrence there can hardly be doubted. 
The fish is abundant in Lake Erie, to which it gained access by means of canals communi- 
cating with streams of the Mississippi Valley. The fish reaches the length of a foot or more. 
It is of little value as food. 
Plate xxxii. Dorosoma cepedianum (Le Sueur). Mud shad; Gizzard shad. 
Like the skipjack, this fish has entered the Great Lakes through canals, and has become very 
abundant in lakes Michigan and Erie. Its flesh is coarse and not of a delicate flavor. The 
fish is about a foot in length and is readily distinguished by the elongated ray in the dorsal fin. 
Plate xxxiii. Coregonus clupeiformis ( Mi t chill). Common whitefish. 
Plate xxxiv. Coregonus ariedi Le Sueur. Cisco ; Lake herring. 
Plate xxxv. Coregonus lioyi (Gill). Hoy’s whitefish ; Lake Moon-eye; Long-jaw. 
The specimen figured was from Seneca Lake, New York, and represents a much more slender race 
than is found in Lake Ontario. The resemblance between this species and the cisco is great. 
In a special paper on this fish, now in course of preparation, its relations, habits, commercial 
importance, etc., will be considered. 
Plate xxxvi. Coregonus quadrilateralls Richardson. Bound whitefish ; Menominee whitefish. 
Plate xxxvii. Coregonus tullibee Bichardson. Tullibee; Mongrel whitefish. 
Plate xxxviii. Salmo salar Linnaeus. Atlantic salmon. 
Plate xxxix. Salvelinus namaycush (Walbaum). Lake trout; Salmon trout. 
Plate XL. Esox lucius Linnaeus. Pike; Pickerel. 
Plate xli. Esox nobilior Thompson. Muskellunge. 
This magnificent fish is comparatively rare in Lake Ontario, but is more or less abundant in the 
St. Lawrence Biver. Examples weighing 65 pounds have been taken in the lake, but the 
maximum in recent years has been much less. This fish may always be distinguished from 
the pike ( E. lucius j by having the lower part of the cheek destitute of scales. 
Plate xlii. Pomoxis sparoides (Lacdpbde). Strawberry bass ; Calico bass. 
Plate xi.iii. Ambloplites rupestris (Bafinesque). Bock bass. 
Abundant in Lake Ontario in suitable situations, and is taken for market in seines, hoop nets, 
etc. It has pronounced game qualities, and readily takes a hook baited with live minnow. 
The weight attained is 14 pounds. Spawns in summer like the black bass. 
Plate xliv. Micropterus salmoides (Lac6pbde). Large-mouthed black bass ; Oswego bass. 
This popular species is very abundant in Lake Ontario and its tributaries. While found in' the 
clear, rapid water of the St. Lawrence Biver and other similar streams, it appears to be most 
at home in quiet or sluggish waters overgrown with rushes and other aquatic plants. The 
large-mouthed black bass may be distinguished from the other species with which it is gen- 
erally associated by its larger mouth, the extension of the maxillary bone beyond the orbit, 
the less numerous and larger scales on the cheeks, the fewer soft rays in the dorsal fin (12 
instead of 13), and many other characters. 
