SIXTY-TWO SPECIES OF FISHES FROM LAKE ERIE 
321 
median and the eye near the middle of the head. Constriction of air bladder has 
not begun, and it is therefore impossible to use that character for identification 
purposes. 
It is undoubtedly a species of Moxostoma, this being the only genus of suckers 
beside Catostomus which is abundant in the region. M. anisurum, M. aureolum, 
and M. lesuerii were taken here in the same summer. The head is rather long for 
the last species, which is especially short-headed. The myomere count of a specimen 
of M. anisurum taken near by was 30 plus 13. Because the myomere count of 
M. aureolum is identical, our specimen probably can be attributed to that species. 
10. Moxostoma anisurum (Rafinesque). White-nosed red-fin mullet; red-horse 
sucker. 
RECORD OF CAPTURE 
Young of this species were found generally at creek mouths during the summers 
of 1928 and 1929. It is a common species of Lake Erie, Niagara River, and large 
tributaries. 
DESCRIPTION 
The 3-chambered air bladder, evident at 19.5 millimeters, and scales in fewer 
than 50 rows distinguish larvae of this genus from other suckers, and the dorsal ray 
count of 14 to 17 identifies M. anisurum from other species of Moxostoma taken locally. 
19. 5 -millimeter stage . — Total length, 19.5; standard length, 16.0; length to vent, 
12.2; head, 4.5; snout, 1.1; eye, 1.3; greatest depth before vent, 3.0; greatest depth 
behind vent, 1.55; length to dorsal, 7.5; length to anal, 12.5 millimeters. Myomeres, 
29 to vent plus 14 behind. Dorsal 15; anal 8 (with 1 very weak unsegmented ray 
before); caudal slender, deeply forked. The young white-nosed red-fin mullet 
strongly resembles the common red-fin mullet ( M . aureolum ), but the great difference 
in myomere count readily identifies the two. Snout abruptly decurved, mouth 
wholly inferior, lower jaw included, lower lip with sides widely conjoined. Third 
chamber of air bladder forming at this stage. 
Pigmentation. — Chromatophores are distributed over snout and top of head 
followed by a very dark double series on dorsal ridge. Smaller ones cover dorso- 
lateral aspect, and the lateral line is well marked by a single series. Subsurface spots 
appear outlining gills, over air bladder, and dorsal surface of intestine. There is a 
ventral irregular series from behind pectorals to vent, thence a double row to caudal. 
Pectorals and ventrals have few pigment spots, but dorsal, anal, and caudal are well 
covered. 
