

ICHTHYOLOGY. 



37 





Catal. 

 No. 



No. of 



spec. 



170 



2 



Locality. 



List of specimens. 



When collected. 



Rio San Juan, near Monterey, New 



Leon 



1853 



Whence obtained. 



Lt. D. N. Couch.. 



Nature of 

 specimens 



Collected by 



Alcoholic. . 



Lieut. Couch 



MINOMUS, Girard. 



Gen. Char. — Eody elongated and fusiform. Head longer than deep , dorsal fin either higher than long, or with both dimen- 

 sions equal. The lips being tuberculated, moderately bilobed. The pharyngeals not expanded laterally, but considerably bent 

 inwardly. The teeth compressed, decidedly bicuspid, but the inner projection more developed than the outer. The scales being 

 nearly of the same size, though slightly smaller anteriorly than posteriorly. They are sub-elliptical, longer than deep, with 

 radiating furrows upon the anterior and posterior sections ; else all aroand. 



Stn. — Minorities, Giin. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 173. 







1. MINOMUS INSIGNIS, Grd. 



Plate XXI, Figs. 1—4. 



Spec. Char. — Body sub-fusiform, elongated, compressed. Head forming two-ninths of the total length. Mouth of medium 

 size, surrounded with considerably developed lips. Eyes large, sub-elliptical ; their longitudinal diameter contained almost six 

 times in the length of the side of head. The dorsal fin is sub-quadrangular ; its anterior margin is situated midway between the 

 snout and the base of caudal fin. The latter is posteriorly furcated, with its angles sub-acute. The anal is quite narrow and 

 elongated ; its base enters three times in the length of its anterior margin. The ventrals are inserted under the posterior half of 

 the dorsal ; their posterior extremity does not reach the vent. The pectorals are elongated, their tips not extending as far back 

 as the anterior margin of the dorsal. 



Stn. — Catostomus insignis, B. & G. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 28. 



Minomus insignis, Grd. in Proc. Acad. Nat. Sc. Philad. VIII. 1856, 173. 



The scales are large ; there are twenty rows of them between the base of the ventrals and 

 the dorsal line. The lateral line takes a straight course along the middle of the sides, and is 

 composed of about sixty scales. 



D 2 11 ; A 2, 7 or 8 ; 3,1,8,8,1,3; V 10 ; P 18, 



The color, as preserved in alcohol, is dark reddish brown above and on the sides, lighter 

 beneath. There is a black dot at the base of each scale, giving a dotted appearance to the 

 body. The fins are unicolor. 



Plate 



Minomu 



region ; fig. 3, a scale from the lateral line ; and, fig. 4, a scale from the abdominal region. 



List of specimens. 





Catal. Cor. No. No. of 



No, 



of teeth . 



Aire. 



spec. 



169 



2738 



4 



Locality 



When col- 

 lected. 



Adult Rio San Pedro, tri utary of Rio Gila. 



1851 



Whence obtained. Nature of Collected by - 



specimen 



Col J. D. Graham 



Yl< oholic! John H.Clark 



