, 
A460 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
toids may be divided into two series, on the presence or absence of this 
slit, as follows: 
Without slit. With slit. 
Ascelichthys. Blepsias. 
Psychrolutes.* Nautichthys. 
Cottunculus. Blennicottus. 
Uranidea. Oligocottus. 
Cottopsis (including Tauridea and | Leptocottus. 
Potamocottus). Scorpeenichthys. 
Cottus. t Liocottus. | 
Artedius. Triglopsis (including Oncocottus). 
Hemitripterus. Gymnacanthus. 
Aspicottus. 
Icelus. 
Triglops. 
Hemilepidotus. 
Melletes. 
2. Coregonus williamsoni Grd.—Mountain Herring. 
Very abundant. 
3. Salmo purpuratus Pallas.—Lake Trout; Brook Trout. 
(Salmo clarki Rich.) 
Very abundant in Utah Lake; a food-fish of much value. 
Specimens obtained do not differ in any visible respect from others 
taken in salt water in Puget Sound. This is apparently the parent 
stock from which S. spilurus, S. trideus, and 8. gairdneri Rich., (S. trun- 
catus Suckley) have scarcely yet become completely differentiated. S. 
henshawi Gill & Jor. is a marked local variety of S. purpuratus. 
4. Squalius tzenia (Cope) J. & G.—Leather-side Minnow. : 
Very abundant. We find it impossible to separate the genera Squalius, 
Telestes, Tigoma, Siboma, Cheonda, and Clinostomus, and we adopt for the 
whole group the name of Squalius. The genus Dobula was established 
by Rafinesque in the Ichthyologia Ohiensis (1820, p. 45). Although no 
type is stated, it was probably based on the Cyprinus dobula L., after- 
wards the type of Squalius Bonaparte. 
5. Squalius montanus (Cope) J. & G. 
Also abundant. 
6. Squalius cruoreus, sp. nov. 
Allied to Squalius ardesiacus Cope, but with larger scales and shorter 
head. 
* We are unable to perceive any distinction between the Psychrolutide and the Cot- 
lide. Psychrolutes has a rudimentary spinous dorsal, hidden in the loose skin, 
tIn Cottus granlandicus, polyacanthocephalus, and scorpius a small pore is present be- 
hind the last gill. In other species (octodecimspinosus ceneus, scorpioides), the slit appears 
to be wholly obliterated. In a specimen of C. polyacanthocephalus of about two feet in 
length there is visible a minute pore representing the usual last slit. 
