126 BOOK OF THE BLACK BASS. 



posterior to the base of pectorals ; upper regions, reddish brown, 

 maculated ; a lateral dark band ; inferior regions whitish, uni- 

 color. 



"It is closely related to, if not identical, with Orystes. nobilis 

 Agassiz, from the southern bend of the Tennessee River. It has, 

 also, much greater affinities with D. fasciatus than with D. ml- 

 moides." — (Girard, U. S. Pac. R. R. Exp. and Surv. X, Fishes, 

 4, 1858.) 



HuRO NIGRICANS Giinther, 1859. — "D. 6j\; A. j\.; L. lat. 

 60-65. Height of body equal to one-tliird of the total length, 

 excluding the caudal; cleft of the mouth obliquely running up- 

 Avards towards the plane of the forehead ; caudal slightly notched ; 

 coloration uniform." — GiJNTHER, Cat. Fishes, Brit. Mm. I, 255, 

 1859.) 



DiOPLiTES NUECENSis Girard, 1859. —"Body elongated sub- 

 fusiform; head constituting a little less than the third of the 

 entire length ; posterior extremity of maxillary extending to a 

 vertical line drawn ^posteriorly to the orbit ; scales on the cheeks 

 nearly equal in size to tliose on the gill covers; origin of the 

 ventrals placed posteriorly to the base of the pectorals ; upper 

 regions reddish brown, maculated; a lateral dark band; inferior 

 regions whitish uni-color. 



" This species is more closely related to D. fasciatus than to D. 

 salmoides, and probably identical with Grystes nobilis (Ag.). 

 At any rate the latter has greater affinities with D. fasciatus than 

 with D. salmoides, the latter being restricted to its proper limits. 



"The body is jDroportionally more elongated than in D. fas- 

 ciatus, resembling more in that respect D. salmoides. It is com- 

 pressed and sub-uniform when seen in profile. The greatest 

 depth is somewhat less than the fourth of the total length, in 

 which the head enters a little less than three times; the mouth 

 is nu)re deeply cleft than in any other of the known sjaecies of 

 the genus, and its gap, is as usual, oblique upwards, owing to 

 the constant protrusion of the lower jaw beyond the upper, 



