Biological Survey — Erie-Niagara Watershed 



93 



of intestine; ventral ridg:e with many branching chromatophores, 

 especially at base of anal ; caudal somewhat marked ; eye very 

 black. AH chromatophores grayish, rather light-colored. 



Fig. 20. — Stizostedion canadense griseum, 14.6 millimeters 



14.6 mm. stage. Fig. 20. D. XIII, 15 (incomplete) ; A. I, 10 

 (incomplete) ; P. rather small; V. small, below P; C. emarginate. 

 Total length 14.6 mm; standard length 12,6 mm; length to vent 

 7.7 mm; greatest depth 2.0 mm; diameter of eye 1.0 mm; 

 myomeres, 21 to vent, 21 behind. Body elongate, dorsal contour 

 slightly depressed before soft dorsal and anal, and somewhat 

 depressed just behind head ; head pointed, sides quite parallel, eyes 

 directed sideward; mouth terminal; large curved teeth in both 

 jaws; maxillary reaching to posterior margin of pupil. First dorsal, 

 consisting of 13 slender spines, originating just behind ventrals. 

 Mostly opaque white. One large chromatophore on dorsal side of 

 intestine at vent, and a double ventral series of c. 25 small, uneven, 

 inconspicuous pigment spots (12 of them around anal) from vent 

 to end of body; few in thoracic region and near posterior limit of 

 lateral line. 



Breeding. — The sauger spawns in early spring on shallow 

 gravelly or sandy bars, often running up rivers. AVith the begin- 

 ning of warm weather it is reported to work its w^ay down stream 

 again and off into deep water. Whether the postlarval stages are 

 common, also, in deep water, or whether this specimen w^as an 

 exception, cannot be determined on our scanty evidence. 



Fajviily Centrarchidae 



Micropterus dolomien Lacepede — Small-mouthed black bass 



Record of Capture. — Six specimens 9.5 to 10.0 mm. long were 

 taken in a Helgoland trawl at 6 meters near Dunkirk on July 11, 

 1928. The 8.8 mm. stage is hatchery material. The largest speci- 

 men figured below came from the mouth of Eighteenmile creek on 

 July 18. 



Fig. 21. — Micropterus dolomieu, 8.8 millimeters. Hatchery specimen 



