34 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
10. Hemitremia phlegethontis (Cope). M. 
Extremely common in the i)Ools of water about the mouth of Provo River and in 
the carp-ponds. It reaches a very small size, none being seen more than inches in 
length. 
Head, depth, 3^. Scales, 36; 17 before dorsal, 11 between dorsal and ven 
trals. Lateral line obsolete, not a pore being developed. Body short, deep, com 
pressed; head short, compressed, with blunt snout. Mouth short, oblique, the lower 
jaw projecting; maxillary reaching to front of eye ; pectorals about reaching ventrals, 
tlie latter to past front of anal. 
Color, dark olive; a dark vertebral streak; a dusky streak along side and a very 
faint caudal spot; scales covered with dark dots. Males in life with fins and sides 
yellow; axil red; sides of belly dashed with red. 
Three of the American species referred to the genus Phoxinus, vittatus {flamnieus 
Jordan & Gilbert), phlegethontis and milnerianm, difter notably from the European 
Phoxinus phoxinns (L.) in the size of their scales. These are 36 to 45 in these species, 
while in Ph. neogmts the scales are about 80, and Ph. phoximis still smaller. 
For these large-scaled species, we may retain the name of Hemitremia, originally 
l)roposed for Hemitremia vittata, by Professor Cope. The name Hemitremia was 
wrongly associated with Notropis heterodon and its allies, before the relations of the 
typical species were understood. 
11. Salmo mykiss Walbaum, var. virginalis Girard. Trout. P., Y. { Salmo virginalis GiravA-, Salmo 
Utah Suckley.) 
Very abundant in Utah Lake; spawning in the shallow parts of the lake and in 
the tributary streams which it ascends to the headwaters. The Utah lake trout have 
the coloration of the Oregon trout, var. clarlci, but the dark spots are usually some- 
what smaller. The only differential character lies in the greater size of the scales, the 
number of these in a horizontal series being usually about 150. 
The large trout of the lakes are deep green in color, the sides silvery, and the dark 
spots small and faint. Lower fins red. Upper fins yellowish. The usual red dash 
under the throat is never absent in this species. An excellent account of the habits 
and economic value of the Utah Lake Trout has been given by Dr. Henry C. Yarrow, 
( Bept. Lieut. Wheeler, Expl. W. 100th Meridian, Y, Zook, pages 685, 693). 
No better trout for the table exist than those of the Utah Lake variety. They 
reach a weight of 3 to 10 pounds. In a single haul of the large seine made in a chan- 
nel on the south side of the lake, fifty trout ranging from 2 to 3^ pounds were taken. 
With these were taken six June suckers {Chasmistes Horns) weighing about 3 pounds 
each, two hundred “Mullet” {Catostomus ardens) weighing about 2 pounds each, one 
webug {Catostomus feeundus) weighing 1 pound, and about two hundred chubs {Leu 
ciscus atrarius), the largest weighing 1^ pounds. This list gives a fair index to tlie 
relative abundance of the larger fishes of the lake. The “Sucker,” and “Webug” 
are, however, at times proportionately more abundant. 
12. Coregouus williamsoni Girard. P., J. Mountain Herring {White fish.) 
This pretty little fish is common in the Provo River above the city, where it may 
be readily taken with the hook. It is also occasionally taken in the Jordan. One speci- 
men was procured by us with the seine in the Jordan and several in the colder Provo. 
It is not a lake fish, being chiefly found in the running waters. Our specimens agree 
