FISHES—CYPRINIDAE-CATOSTOMUS MACROCHEILUS 
225 
the inferior surface of the head and abdomen being yellowish or whitish. The specimen before 
ns measures fifteen inches in total length. 
List of specimens. 
Catal 
No. 
Corresponding 
No. of teeth. 
No. of 
spec. 
Age. 
Locality. 
When 
collected. 
Whence obtained. 
Nature of ' 
specimen. 
Collected by— 
239 
2792 
i 
Adult. 
Klamath lake, Cal. 
1855 
Lt. R. S. Williamson. 
Alcoholic. 
Dr. John S Newberry. 
3. CATOSTOMUS MACROCHEILUS, G-rd. 
Spec. Char. —Head constituting the fifth of the total length. Eye of medium size. Mouth large, provided with large lips 
and conspicuous labial papillae. Isthmus very broad. Dorsal fin much longer than high; its anterior margin nearly equi¬ 
distant between the extremity of the snout and the insertion of the caudal. Insertion of ventrals situated opposite the anterior 
third of the dorsal, and nearer the extremity of the snout than the tip of the lower lobe of the caudal. Posterior extremity 
of the anal extending beyond the rudimentary rays of the caudal, which is posteriorly crescent-shaped. Scales rather large. 
Bluish black above; whitish beneath. 
Syn. — Catostomusmacrocheilus, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 175. 
This species is very different from the preceding two ; the head is larger and more elongated ; 
the mouth larger, and hence much larger lips, covered with large papillae. The scales which 
cover the body are larger than in G. occidentalism and smaller than in G. labiatus. The head 
constitutes the fifth of the total length ; the horizontal diameter of the eye is contained nearly 
six times in the length of the side of the head. The head itself is sub-quadrangularly pyramidal, 
anteriorly truncated with the upper edge of the snout projecting. The anterior margin of the 
dorsal is a little nearer the end of the snout than the insertion of the caudal fin ; its upper 
margin is concave ; its base enters over six times and a half in the total length. The anal is 
well developed, for, its tip extends beyond the base of the caudal. The ventrals are inserted in 
advance of the middle of the dorsal. The pectorals are large and elongated. 
D 2, 14 + 1 ; A 1, 8 ; C 5, 1, 8, 8, 6 ; Y 11; P 18. 
The scales are nearly as deep as long, irregularly rounded, well imbricated, with radiating 
grooves upon their anterior and posterior sections. The specimen observed measures sixteen 
inches in total length. 
The dorsal region above the lateral line is bluish black ; a darker broad streak may be traced 
along and below the lateral line, over the side of the head across the orbit. The rest of the 
flank is of a metallic yellow, which extends similarly over the side of the head, the inferior 
surface of which, as well as the abdomen, are whitish. 
List of specimens. 
Catal. 
No. 
Corresponding 
No of teeth. 
No. of 
spec. 
Age. 
Locality. 
When 
collected. 
Whence obtained. 
Nature of 
specimen. 
Collected by— 
240 
2793 
i 
Adult. 
Astoria, Oregon. 
1854 
Lt. W. P. Trowbridge. 
Alcoholic. 
Lt. Trowbridge. 
