58 



UNITED STATES AND MEXICAN BOUNDARY. 



Plate XXX, fig. 1, represents Montana rutila, size of life; fig. 2, a dorsal scale; fig. 3, a 

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



Catal. 

 No. 



93 



List of specimens. 



Cor. No. 

 of teeth. 





2693 



No. of 



epec. 



Age 



Locality. 



When col- 

 lected. 



Whence obtained. 



10 Adult. Cadereita, New Leon, 



Mexico. 



1853 



Nature of 

 specimen. 



Collected by 



Lieut. D. N. Couch... 



Alcoholic . 



Lieut. D. N. Couch 



6. MONIANA NITIDA, Grd. 



This species differs from M. coachi by a more elongated and fusiform body, more elongated 

 head, and much larger eye. From M. rutila it differs by the same characters of the body, but 

 the head differs by the flattening of its upper surface. There are eleven longitudinal rows of 

 scales upon the line of greatest depth of the body, five above and five below the lateral line. 

 The latter, therefore, is nearly median, forming but a slight curve upon the middle of the 

 abdomen. Color pale red; sides of head and middle of the flanks silvery. 



Stn. — Montana nitida, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 201. 



List of specimens. 



Catal. Cor. No. 



No. 



of teeth . 



No. of 

 spec. 



Locality 



When 

 collected. 



96 



2G95 



Whence obtained. 



2 



Cadereita, New Leon, Mex . 



1853 



Lt. D. N. Couch 



Nature of 

 specimen. 



Collected by 



Alcoholic- Lieut. Couch 



7. MONIANA FORMOSA, Grd. 



Plate XXX, Figs. 5—8. 



The prettiest species of the genus ; the body is fusiform in profile and the tail very much 

 tapering. The region above the lateral line is blackish brown in the adult, and reddish brown 

 in the young, occasionally also dotted with black ; the inferior regions are reddish yellow 

 anteriorly and yellowish red posteriorly. 



SYK.—Monianaformosa, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 201. 



Plate XXX, fig. 5, represents Montana formosa, size of life ; fig. 6 is a dorsal scale ; fig. 7, 

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



List of specimens. 



Catal. Cor. No. 

 No. of teeth. 



No. of 



spec. 





113 

 114 



2700 



4 

 20 



Locality. 



When col- 

 lected. 



Whence obtained. 



Nature of 

 specimen. 



Rio Mimbres, Mexico 



1854 



Major Emory Alcoholic . 



Collected by 



Dr. C. B. Kennerly . • 



