FISHES PERCIDAE — CALLIURUS FORMOSUS. 



16 



the total length. The insertion of the ventrals takes place opposite the inferior margin of the 

 base of the pectorals, and a little posteriorly to the origin of the dorsal ; their tips overlap the 

 vent, which is situated near the origin of the anal fin. The pectorals are suhovate, of 

 moderate development, and extending as far back as the ventrals. 



Br. VI : VI ; D X, 11 ; A III, 9 ; C 3, 1, 8, 7, 1, 4 ; V I, 5 ; P 13. 



The external spiny ray of the ventral fins is rather slender and acute, closely approximating 

 the first soft ray, and apparently confounded with it, upon a superficial examination. 



The scales are moderate in their development, a little deeper than long, with radiating 

 furrows upon their anterior section, and so very deciduously jiectinated that the serratures fall 

 off in the handling of the specimens. They are considerably smaller upon the nape and dorsal 

 region generally than towards the flanks, and a good deal smaller also upon the cheeks than 

 upon the opercular apparatus. Under the throat their size is likewise reduced. The caudal 

 and the soft rays of both the dorsal and anal fins are provided upon their base with exiguous 

 and irregularly shaped scales. 



The upper region of the head and body is reddish brown ; the dorsal region, the middle of 

 the flanks, and the side of the head being spotted with black. Beneath, the color is uniformly 

 greyish. The dorsal and anal fins exhibit a large black patch at the base of their posterior 

 margin. The fins otherwise are greyish olive, the external margin of the dorsal, caudal, and 

 anal being yellowish white, whilst the ventrals and pectorals are unicolor — the former yellowish, 

 the latter greyish. The black patch at the posterior portion of the opercle is surrounded by a 

 yellowish or whitish ring. 



References to the figures. — Plate V, fig. 1, represents CaUiurus formosus, size of life. Fig. 2 is 

 a scale from the dorsal region. Fig. 3, a scale from the lateral line. Fig. 4, a scale from the 

 abdominal region. 



List of specimens. 



03 

 O 



,'i75 



376 



377 

 378 

 379 



380 

 381 

 382 

 420 

 419 



a 



Adult. 



Locality. 



Tributary of Gypsum creek, 



Canadian. 

 Headwaters of Brazos 



river. 

 do.... 



...do 



-do do 



Headwaters of Colorado, 

 Texas. 



.do. 



.do. 



Fort Washita, Red river . 

 Fort Smitli, Arkansas . . . 



do do 



Rio Brazos 





1853 



1853 



1853 

 1853 

 1853 



1853 

 1853 

 1853 

 1853 

 1853 



Whence obtained. 



Lieut. Whipple. 

 Capt. Pope 



.do. 



.do. 

 .do. 



-do. 

 -do. 



Lieut. Whipple. 



.do 



Dr. ShumarJ 



I 



s 

 a 



"3 

 g 



XV. 



izi 



Alcoholic. 



.do. 



.do- 

 .do. 

 .do. 



-do. 



.do. 



.do- 

 -do- 

 -do- 



Collected by- 



H. B. Mollhaustn. 

 Captain Pope. 

 do 



-do- 

 .do. 



-do- 



-do- 



Dr. Shumaril. 

 H. B. Mollhaustn. 

 Dr. Shumard. 



