52 



UNITED STATES AND MEXICAN BOUNDARY. 



List of specimens. 



Catal. 

 No. 



j 

 Cor. No. 



of teeth . 



No. of 

 spec. 



Locality. 



When 



collected. 







1851 



Whence obtained. 



Nature of 

 specimen. 



Collected by — 



72 



2677 



15 



Rio Leona,trib. of Rio Nueces, Tex. . 



Col. J. D. Graham. . 



Alcoholic. 



John H. Clark.. 



2. ALBUKNELLUS MEGALOPS, Grd. 



Plate XXIX, Figs. 1—4. 



Resembles A. amahilis in general traits, being slender and graceful, but easily distinguished 

 from it by a shorter and more rounded snout and a larger eye. The coloration is the same, with 

 the exception of the black caudal patch, which does not exist here. The average size of the 

 specimens before us is about two inches in total length. 



Syn. — Jllburnus megalops, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 193. 



Plate XXIX, fig. 1, represents Alburnellus megalops, size of life ; fig. 2 is a dorsal scale ; fig. 

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



List of specimens. 



Catal. 

 No. 



69 



No. of 

 spec 



•20 



Locality. 





When 

 collected 



San Felipe creek, Texas 1851 



Whence obtained 



Col. J. D Graham 



Nature of 

 specimen. 



Collected by- 



Alcoholic. John H- Clark 



8. ALBUKNELLUS SOCIUS, Grd 



Plate XXIX, Figs. 14—17. 



Resembles A. megalops by its snout and eye. The total length is two inches and three- 

 quarters, the head forming the fifth part of it. The greatest depth is a little less than the 

 lengtTi of the head. The dorsal region is olivaceous, the flanks silvery, and the belly yellowish. 

 Opercular apparatus golden. 



Ssn. — Alburnus socius, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 193. 



Plate XXIX, fig. 14, represents Alburnellus socius, size of life ; fig. 15 is a dorsal scale ; fig. 

 16, a scale from the lateral line ; and, fig. 17, a scale from the abdominal region. 



Catal. Cor. No. No. of 



No. of teeth. 



spec 



70 



2676 



20 



Locality. 



List of specimens. 



Live Oak creek, Texas. . 



Whence obtained. 



Nature of 

 specimen. 



Collected by 



Col. J. D. Graham 



Alcoholic. John H. Clark 



! 



