FISHES PERCIDAE CALLIURUS MICROPS. 



17 



C3 



o 



404 

 405 

 406 

 407 

 408 

 409 



Locality. 



Ldst of specimens. 



otter creek, Arkansas 



Eio Cibolo, Texas 



Mineville, Texas 



Eio Seco, Texas 



Platte river 



Eio Pecos 



^ 



1851 

 1851 

 1853 

 1853 

 1856 

 1856 



Wlience obtained. 



Capts. Marcy and McClelland. 



Colonel Graham 



Major Emory 



Lieutenant WMpple 



Captain Pope 



do - 



19 



C3 

 IZi 



Alcoholic. 

 ...do 



-do. 



.do. 



.do- 

 .do: 



Collected by — 



Captain Marcy . 

 John H. Clark . 

 Dr. Kennerly . , 

 do 



Captain Pope. 

 do 



5. CALLIURUS MICROPS, G r d . 

 Plate IV, Figs. 5—8. 



Spec. Chak. — Mouth moderate ; gape oblique upwards. Posterior extremity of maxillary extending to a vertical line drawn 

 midway between the anterior rim of the orbit and the pupil. Eye small. Insertion of ventrals situated posteriorly to tlie 

 base of pectorals and the origin of the dorsal ; tlieir tips not reaching the vent. Scales moderate. Eeddish brown above, 

 with centre of scales lighter ; greyish beneath. Soft portion of dorsal provided with a black patch. 

 Stn. — CalHurus mkrops, Grd. in Proc. Acad. Nat. So. Philad. November, 185T. 



This species is very characteristic, owing to the comparatively small size of its eyes and the 

 reduced cleft of its mouth, to which might he added the disproportional size between, the scales 

 on the cheeks and those on the opercular apparatus. The posterior extremities of both the dorsal 

 and anal fins do not extend as far back as the insertion of the caudal. 



The head constitutes a little less than the third of the total length, which is exactly three 

 times- the greatest depth. The outline of the body is rather regularly elliptical. The edge of 

 the preopercle is minutely serrated. 



The scales are higher than long ; the pectinations of their posterior margin being altogether 

 obliterated. 



Br. VI: VI; D X, 11; A III, 9 ; C 3, 1,8, 1, 1, 2; VI, 5; P 13. 



The extremities of the pectorals are nearly even with the tips of the ventrals, which do not 

 reach the vent, situated a little way in advance of the anterior margin of the anal fin. 



The dorsal region is dark reddish brown, as well as the upper surface of the head. The sides 

 of the head and flanks are of a lighter hue ; and since the middle of the scales on the latter 

 region are marked with a very light spot, the sides of the body appear as if provided with 

 longitudinal white stripes. The inferior region is greyish or whitish. The fins are unicolor, 

 of a greyish olive ; the posterior portion of the dorsal fin alone exhibiting a dark or jet black 

 spot. 



References to the figures. — Plate IV, fig. 5, represents Galliurus microps, 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. 

 3a 



