334 
BULLETIN OF THE BUREAU OF FISHERIES 
BREEDING 
Spawning occurs during late June and early July in shallow inshore waters. 
20. Notropis hudsonius (Clinton). Spot-tailed minnow. [Hudsonius hudsonius 
(DeWitt Clinton). Jordan, Evermann, Clark, p. 132.] 
RECORD OF CAPTURE 
Many ripe adults were taken in dip nets near Sturgeon Point in the middle of 
June, 1928, and one early larva tentatively assigned to this species, 5.2 millimeters 
long, was taken in a Helgoland trawl at 5 meters near Athol Spring on July 12. The 
straw-colored minnow is extremely abundant in the lake, and ascends some of the 
larger creeks. 
DESCRIPTION 
The present larva is characterized by a stout body and very blunt, bulbous head 
with large eyes and wide interorbital space, distinguishing it from N. atherinoides and 
N. deliciosus stramineus. Its small size compares unfavorably with specimens of 
N. cornuius of like development. 
5 .0- millimeter stage. — Total length, 5.0; length to vent, 2.75; greatest depth 0.96 ; 
diameter of eye, 0.5 millimeter. Myomeres, 17 to vent plus 15+ behind. Charac- 
terized by very blunt, bulbous head, with large eyes at the anterior margin and wide 
interorbital space; mouth moderate, inferior, lower jaw included. Large yellow oil 
globule anteriorly placed in stomach region. 
Pigmentation. — A few chromatophores appear on sides of head, and many black 
stellate ones are distributed over ventral aspect to vent. About 4 very large sub- 
surface chromatophores occur over top of stomach region, and 4 long, dark, linear 
patches behind vent on ventral ridge. 
This species has general characters in common with N. cornutus, but its very small 
size compares unfavorably with specimens of like development of the latter. The 
head is too blunt and body too stout for young N. deliciosus or N. atherinoides. Quite 
possibly it is N. hudsonius , for many adults with ripe eggs were taken in a dip net 
near by at this time. 
For comparison the description is given of a postlarval N. hudsonius taken at the 
mouth of Eighteen Mile Creek on July 18, 1928. 
19.0- millimeter stage. — Dorsal, 8; anal, 9; caudal deeply forked; ventrals just 
anterior to dorsal origin, rays extending beyond vent. Total length, 19.0; standard 
length, 16.0; length to vent, 10.5; length of head, 4.2; greatest depth, 3.25 milli- 
meters. Myomeres, 22 to vent plus 18 behind. Conical head with very blunt snout; 
small, nearly horizontal mouth, lower jaw shorter. 
