28 
ZOOLOGY. 
51. CATOSTOMUS OCCIDENTALS, Ayres. 
General Report upon Fishes. 
Eye and mouth of medium size ; labial papillas small and rather inconspicuous. Isthmus 
very broad. Dorsal fin longer than high. Anterior margin of ventrals corresponding to the 
middle of the dorsal fin. Posterior extremity of anal reaching the rudimentary rays upon the 
inferior lobe of the caudal; latter moderately forked. Upper regions of a greyish lead tint; 
beneath, of a soiled yellow or white. 
A true “ Sucker.” 
List of specimens. 
Catalogue 
Correspond’g 
No. of 
Sex and 
Locality. 
When 
Collected by— 
Nature of spe- 
number. 
number. 
specimens. 
age. 
collected. 
cimens. 
241 
2794 
2 
Adult. 
San Francisco, Cal. 
1855 
Dr. Newberry... 
Alcoholic. 
52. CATOSTOMUS LABIATUS, Ayres. 
General Report upon Fishes. 
Eye small; mouth of medium size; labial papillse conspicuously developed. Dorsal fin 
higher than long. Pectoral fins quite elongated and well developed. Insertion of ventrals 
situated opposite the posterior third of the base of the dorsal. The scales are large. Upper 
regions black ; lower half of sides black, clouded upon a yellow ground, whilst the belly and 
inferior surface of the head are yellow—almost unicolor. 
Another true “ Sucker,” and so called by fishermen. 
List of specimens. 
Catalogue 
Correspond’g 
No. of 
Sex and 
Locality. 
When 
Collected by— 
Nature of spe- 
number. 
number. 
specimens. 
age. 
collected. 
cimens. 
239 
2792 
i 
Adult. 
Klamath lake, Oregon_ 
1855 
Dr. Newberry. .. 
Alcoholic. 
53. ORTIIODON M1CROLEPIDOTUS, Grd. 
Plate LIII, figs. 1-4. — General Report upon Fishes. 
Head moderate, its upper surface flattened and declivous towards the snout, which is obtusely 
wedge shaped. Mouth moderate, broad ; posterior extremity of maxillary extending to a ver¬ 
tical line intersecting the nostril. Isthmus very narrow. The anterior margin of the dorsal is 
placed somewhat in advance of the insertion of the ventrals. Peduncle of tail slender. Ven¬ 
trals broad. Greyish brown above, whitish or yellowish beneath. 
Has no vernacular name, so far as we have heard. 
List of specimens. 
Catalogue 
number. 
Correspond’g 
number. 
No. of 
specimens. 
Sex and 
age. 
Locality. 
When 
collected. 
Collected by— 
Nature of spe¬ 
cimens. 
206 
2764 
i 
u. , ~ 
Adult. 
San Francisco, Cal._ 
1855 
Dr. Newberry... 
Alcoholic. 
