ICHTHYOLOGY. 



13 







Br. VI: VI; DX 



7 



VI, 5; P16. 



In the absence of authentic specimens of A. concinnus, Ag., and A. lineatus, Ag., we are not 

 prepared to point out the affinities of these species with the one here referred to. 



Plate V, fig. 6, represents Amblodon neglectus, size of life ; fig. 7 is the head seen from 

 beneath ; fig. 8, a scale from the dorsal region ; fig. 9 ; a scale from the lateral line ; and, fig. 

 10, a scale from the abdominal region. 



List of specimens. 



Catal. 



No. of 



No. 



spec. 



636 



1 



637 



24 



Locality. 



When collected 



Whence obtained 



Mouth of Rio Grande del 



Norte (Rio Bravo). 

 Matamoras (Tamaulipas).. 



1853 



1853 



Nature of 

 specimen. 



Collected by 



Major Emory Alcoholic. 



D.N. Couch 



do 



John H. Clark 



L. Berlandier 



UMBRINA PHAL AENA, G r d . 



Plate V, Figs. 1—5. 



Spec. Char. — Head contained a little less than four times in the total length, pre-opercular spines inconspicuous. 

 Posterior extremity of maxillary corresponding to a vertical line drawn across the anterior rim of the pupil. Outer row of 

 pre-maxillar teeth very conspicuous. Longitudinal diameter of the eye entering six times and a half in the length of the side 

 of the head : twice in advance of the anterior rim of the orbit. Origin of ventral fins opposite the third dorsal spine. Origin 

 of anal situated under the eighth articulated ray of the second dorsal. Caudal fin slightly concave posteriorly, constituting 

 about the sixth of the total length. 



The last anal ray being bifurcated from its very base, otherwise there would be but seven soft 

 rays to that fin. The scales are much deeper than long, finely pectinated upon their posterior 

 section, and exhibiting radiating furrows upon their anterior section alone. 



Br. VII: VII; D X, I, 23 ; A I, 8 ; C4, 1, 8, 7, 1, 3 ; VI, 5 ; P 1, 21. 



Upper regions greyish brown, obscurely clouded ; inferior regions of a dirty white hue, with 

 minute black specks. Fins olivaceous ; pectorals, anal, and caudal speckled ; dorsals and 

 ventrals unicolor, except the first dorsal, which is blackish upon its upper margin. 



Plate V, fig. 1, represents Umbrina phalaena, size of life; fig. 2 is the head viewed from 

 beneath, showing the outline of the mouth ; fig. 3, a scale from the dorsal region ; fig. 4, a 

 scale from the lateral line ; and fig. 5, a scale from the abdominal region. 



List of specimens. 



Catal. No. of Age. 



No. 



spec 



Locality. 



When collected. 



619 

 6*0 



1 

 4 



Adult. 



Indianola, Texas 

 Young Brazos Santiago 



1851 

 1853 



Whence obtained. 



Nature of 

 specimen. 



Collected by 



Col. J. D. Graham .. 



G. Wurdemann 



John II . Clark 



G. Wurdemann 



MICROPOGON UNDULATUS, Cuv.&Val 



Grunt er and Croaker. 



Plate VII. 



Spec. Char.— The greatest depth under the first dorsal fin is a little less than the fourth of the total length, in which the 

 head enters three and three-quarters of a time. The posterior extremity of the maxillary is even with a vertical line drawn 

 in advance of the pupil. The eye is sub-elliptical ; its longitudinal diameter entering about five times in the length of the side 

 of the head. Tne caudal fin constitutes the fifth of the total length, in which the base of the anal enters twelve times. The 

 base of the first dorsal is a little more than the half of that of the second dorsal. 



