





ICHTHYOLOGY. 



43 







Plate XXVI, fig. 21, represents Dionda texensis, size of life ; fig. 22 is a scale from the dorsal 

 region ; fig. 23, a scale from the lateral line ; and, fig. 24, a scale from the abdominal region. 



List of specimens. 



Catalogue Cor. No. 



No. 



of teeth. 



No. of 



spec. 



Locality 



44 



2657 



30 



Rio Nueces, Texas 



When col- 

 lected. 



Whence obtained 



Nature of 

 specimen. 



Collect I by 



1851 



Col. J. D. Graham 



Alcoholic. Jno. II. Clark 



3. DIONDA ARGENTOSA, Grd. 



Plate XXVI, Figs. 5—8. 



> 



Spec Char. — Has a small head and an obtuse snout, a rather slender and compressed body. The head constitutes two-elevenths 

 of the total length. The insertion of the ventrals is situated opposite the anterior margin of the dorsal. The scales being 

 quite large, the lateral line is slightly deflected upon the thoracic region. Color of the dorsal region reddish brown ; sides and 

 abdomen as if painted over with silver or quicksilver. Fins olivaceous. 



Syn. — Dionda argentosa, Grd. in Proc. Acad. Nat. Sc, Philad. VIII, 1856, 178. 



Plate XXVI, fig. 5, represents Dionda argentosa, size of life; fig. 6 is a scale from the dorsal 

 region; fig. 7, a scale from the lateral line; and, fig. 8, a scale from the abdominal region. 



List of specimens. 



Cata?. 



No. 



Cor. No. No. of 



of teeth. 



32 



33 



2646 

 2647 



spec. 



Locality. 



When 

 collected. 



Whence obtained. Nature of specimen 



10 

 4 



San Felipe creek,Tex 

 Devil 's river, Texas 



1851 

 1851 



Col. J. D. Graham Alcoholic 



do 



do 



Collected by 



John H. Chrk... 



do 



4. DIONDA CHRYSITIS, Grd. 

 Plate XXVI, Figs. 13-16. 



Spec. Char. — Very slender and compressed; head very small and obtuse, contained six times in the total length. Eyes large 

 and circular. Origin of ventrals opposite the anterior margin of dorsal. Upper surface of head tuberculous. Scales large. 

 Dorsal region reddish brown ; sides and abdomen as if painted with gold. A black spot upon tke base of the caudal fin Fina 

 themselves yellowish or olivaceous. 



Syn.— Dionda chrysitis, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 173. 



Plate XXVI, fig. 13, represents Dionda chrysitis, size of life ; fig. 14, a scale from the dorsal 

 region ; fig. 15, a scale from the lateral line; and, fig. 1G, a scale from the abdominal region. 



List of specimens. 



Catal. 

 No. 



Cor. No. 

 of teeth. 



37 



2651 



No. oi 



Locality. 



When 

 collected 



Whence obta ; ncd. Nature of 



specimen. 



Collected by 



Live Oak creek, Tims.. 



1851 



Col. J. D. Graham. Alcoholic . . 



John H. Clark 



