24 



U. S. p. R. R. EXP. AND SURVEYS ZOOLOGY GENERAL REPORT. 



more advanced position of the dorsal fin, with reference to the insertion of the ventrals. Tlie 

 pectoral fins themselves assume the elongated aspect which they have in P. heros. 



References to the figures. — Plate VIII, fig. 5, represents, size of life, an immature specimen of 

 Pomotis speciosus, caught in the Kio Seco, Texas. 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. 



Adult. . 

 Young . 

 Adult-. 

 Young . 

 ..do. .. 

 ..do... 

 ..do. -. 

 Adult. 



Locality. 



Whence tained. 



.a 



a 



a 



Brownsville. Texas j Capt. Van Vliet 1&2 



-do. 



Near Indianola, Texas 



Devil's river, Texas 



Cadereita, New Leon 



Eio Medina, Texas 



Kio Seco, Texas 



New Braunsfels, Texas 



do 



Capt. J. Pope ... 

 Major Emory . . . 



Lieut. Couch 



Lieut. Whipple.. 



do 



Dr. Lindheimer . 



63 

 23 



18 



Nature of speci- 

 mens. 



Alcoholic. 

 do.. 



do.. 



do.. 



do.. 



do.. 



do.. 



do.. 



Collected by- 



Capt. Van Vliet. 

 do 



Capt. Pope 



Dr. Kennerly ... 



Lieut. Couch 



Dr. Kennerly . . , 



do 



Dr. Lindheimer . 



3. POMOTIS HEROS, B. & G. 

 Plate IX, Figs. 13—16. 



Spec Char. — Head, mouth, and eye larger than in P. speciosus ; edge of preopercle inconspicuously serrated ; 

 projecting beyond the tips of ventrals ; anal fin provided occasionally with a black patch, as well as the dor.sal. 



pectorals 



Sn>.—Famo(is heros, B. & G. Proc. Acad. Nat. Sc. Phiiad. VII, 1854, 25. 



This species, like the preceding one, was first collected by the United States and Mexican 

 Boundary Commission, consequently its description and figure will be found annexed to the 

 Eeport on that survey. It is more closely allied to P. incisor than even P. speciosus. It has 

 also intimate affinities with P. solis, Cuv. & Val. Hist. nat. des Poiss. VII, 1831, 468. 



References to the figures. — Plate IX, fig. 13, rej^resents the young oi Pomotis heros, caught in 

 tlie Rio Blanco, Texas. Fig. 14 is a dorsal scale. Fig. 15, a scale from the lateral line. Fig. 

 16, a scale from the abdominal region. 



