56 
BUI*LETIN OF THE UNITED STATES FISH COMMISSION. 
from tlie Uncompahgre River. The cartilaginous sheath is quite as well developed, 
the scales are equally small, and the foutanelle is as imperfect. 
All the other specimens in the Museum labeled Catostomus discobolus were col- 
lected by Capt. Bendire, in Lapwai Creek, Idaho, which is in the Snake River Basin, 
and are undoubtedly the young of Catostomus catostomus. 
The specimens collected at Amarilla, N. Mex., by Dr. Yarrow have the caudal 
peduncle a little deeper than in other specimens of discobolus with which I have com- 
pared them, but they are certainly not generosus; they may possibly be plebeius, but 
are most likely discobolus. 
According to this view, Prof. Cope’s types of P.jarrovii from the Rio Grande are 
plebeius, those from the Utah basin are generosus , and those (if any) from the Colo- 
rado basin are discobolus. All these specimens are small and some of them, partic- 
ularly those said to be from Zuni, are in such poor condition as to render certain 
identification impossible. It is possible that the locality labels have been confused. 
In P. discobolus the lower lip is somewhat broader and the tubercles smaller 
than m.plebeius and generosus. It bears a close external resemblance to G. latipinnis, 
especially in the general shape of the body, the slender caudal peduncle, and the small,, 
subequal scales, but the eye is smaller. 
List of specimens of Pantosteus now found in U. S. National Mas 
Nat. 
Mus. 
No. 
20913 
16758 
15763 
168 
18009 
18011 
5910 
(3029) ; 
41645' 
(3047)! 
41659' 
15783 
12914 
15791 
12906 
256 
f.c. ; 
(3006)', 
41624) 
(3027)) 
41631 ( 
(3020) ( 
41627) 
Dr. H. C. Yarrow 
C. E. Aiken 
Yarrow & .Henshaw . 
J.H. Clark 
do 
Dr. H. C. Yarrow 
Cope & Shedd 
Dr. H. C. Yarrow 
.do . 
Lieut. Beale 
Jordan & Evermann. 
do 
H. W. Henshaw 
Dr. C. G. Newberry . . 
do 
Yarrow & Henshaw . 
H. W. Henshaw 
Dr. C. B. Kennerly . 
Lieut. E. P. Beckwith. 
Jordan & Evermann . 
Locality. 
‘ ‘ Amarilla, N. Mex ’ ’ . 
Arkansas River, Pu- 
eblo, Colo. 
Provo, Utah 
Rio Mimbres, Lake 
Guzmany Chihuahua. 
Rio Mimbres, Lake 
Guzman. 
•‘Rio Grande, 11 de 
Fonso.” 
Nutrias, Colo 
“ New Mexico’’ 
.do.. 
Ojo de Galld, N. Mex. 
)Rio Grande, Alamosa, 
t Colo. 
<Rio Conejos, Alamosa, 
) Colo. 
Zuni, N. Mex 
“Arizona” 
do 
Provo, Utah 
Zuni, N. Mex. (Local- 
ity probably wrong.) 
Utah Lake 
Utah Lake, Provo, 
Utah. ' - 
Rio Janos, Lake Guz- 
man, Chihuahua. 
) Uncompahgre River, 
\ Delta, Colo. 
Jordan River, Utah. . 
Pantosteus generosus, part 
of the types of P.jarrovii. 
Pantosteus guzmaniensis, 
type of P. virescens. 
Pantosteus generosus, types 
of P. platyrhynchus. 
Pantosteus plebeius (type 
of Catostomus plebeius). 
Pantosteus plebeiusjypes-. 
Pantosteus generosus, part 
of types of P. jarrovii. 
Pantosteus generosus, part 
Of types of P. jarrovii. (?) 
Pantosteus generosus, part 
of types of P. jarrovii. 
do 
Pantosteus generosus . 
Pantosteus plebeius - - 
Pantosteus generosus, part 
of the types of P.jarrovii. 
do - 
Pantosteus guzmaniensis 
(type of Acomus guzman- 
iensis) . 
Pantosteus generosus (type 
of Acomus generosus) . 
Pantosteus generosus - . 
Pantosteus delphinus. 
Pantosteus generosus. 
Identification. 
Pantosteus discobolus 
Pantosteus virescens. 
Pantosteus generosus. 
Pantosteus plebeius. 
Do. 
Do. 
Do. 
Do. 
Do. 
Pantosteus discobolus. 
- Do. 
Do. 
Pantosteus generosus. 
Pantosteus plebeius. 
Pantosteus generosus. 
Pantosteus discobol us. 
Pantosteus generosus. 
Washington, January 25, 1893. 
