PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 461 
Form of the species termed “Clinostomus”, but less compressed. Body 
moderately elongate, somewhat compressed, symmetrical, the back 
considerably arched ; caudal peduncle rather stout. Head subconical, 
laterally compressed, broad and rounded above; mouth short, oblique, 
jaws about equal. Premaxillary in front on the level of the lower edge 
of the pupil; maxillary reaching to opposite the front of the eye. Kye 
large, about as long as snout, 43 in head. Isthmus narrow; scales firm, 
not closely imbricated; the belly with imbedded scales. Lateral line 
complete, running low, but not greatly decurved. Dorsal fin inserted 
a little behind the ventrals, scarcely nearer base of caudal than snout. 
Caudal fin evenly forked. Pectorals shortish, not reaching nearly to 
the ventrals; the ventrals reaching to the vent. Head contained 4 times 
in length to base of caudal; greatest depth equal to length of head 
Fin-rays: Dorsal 9; anal 8. Scales 11-56--6. Teeth 2, 5-4, 2, without 
evident masticatory surface. This latter character is, however, so vari- 
able in the Cyprinoids of this type as to be scarcely even of specific 
value. Back and fins dusky bluish; sides of body and head dark, with 
fine punctulations; a red spot at base of each ventral and of anal. 
Numerous specimens, the longest 6 inchesinlength. This species is re- 
lated to S. ardesiacus (Cope), but it has a deeper body and larger scales, 
the pectorals are shorter and length of the head proportionately less. 
7. Squalius copei, sp. nov. 
(Hybopsis egregius Cope, Ann. Rept. U. 8. Geol. Surv. Terr. 1870, 438; Cope 
& Yarrow, Wheeler’s Expl. W. 100th Mer. v, 662, 1877; not Tigoma 
egregia Girard. ) 
Numerous specimens of this species were obtained at Evanston, Wyo., 
of boys fishing with hook and line in tributaries of Bear River. It 
has not been observed in Utah Lake. As the original types of Tigoma 
egregia, examined by us, have 66 scales only in the lateral line, the species 
called Tigoma egregia by Professor Cope is distinct from it, and may 
receive the above specific name. 
8. Squalius atrarius (Girard) J. & G. 
This “chub” is very abundant in Utah Lake. It is exceedingly 
destructive to the young trout, well meriting the epithet of “devilish. 
chub” applied to it by Mr. Madsen. 
9. Squalius rhomaleus, sp. nov. 
Allied to Squalius niger (Cope), but with the large scales of Squalius 
squamatus (Gill). 
Body robust, elevated anteriorly, somewhat compressed or flat-sided, 
although the back is very broad. Head broad, considerably concave in 
profile as seen from the side, as in the groups called Platygobio and Gila; 
the interocular space flattish, scarcely raised above the level of the 
upper edge of the eye. Snout rather broad, somewhat elevated at tip; 
the premaxillary on the level of the pupil; the form of the head resem- 
bling that of Chasmistes. Mouth very oblique, its cleft at an angle of 
about 45°; the mandible much projecting. Maxillary extending to the 
