Cope.] -xOi [June 7, 



17. MiCROPTERUS NIGRICANS, Cuv. 



The green bass is abundant in all the rivers of the State. I have it from 

 the Neuse, Yadkin, Catawba, upjier and lower French Broad, and from 

 the Clinch in Tennessee. Specimens from the Neuse and from near Nor- 

 folk, Virginia, six in number, differ from those of the other rivers, in 

 having a deeper body, and generally longer and more prominent man- 

 dible. The depth enters the length 2.75 times ; in the more western forms 

 always 3.25 times ; in the former it is greater than the length of the head, 

 in the latter it is considerably less. Other differences are not discoverable 

 and I regard it as a marked variety only. 



POMOXYS, Raf., Agass. 



18. POMOXYS HEXACANTHUS, C. V. 



Neuse River. 



Numerous specimens of this species and the Pomoxys storerius from 

 Leavenworth, on the Missouri River, from Saml. H. Edge. 



CENTRARCHUS, C. V. 



19. Centearchus irideus, Cuv., Val. 



Vol. III., p. 89, Holbrook Ichdi. S. Ca., 18, Tab. III., fig. 1. 



From the Neuse River. A specimen presenting an additional dorsal 

 and anal ray, as compared with the description of Cuvier and Valenci- 

 ennes ; but Holbrook adds one to the anal spines, thus agreeing with 

 anal formula D. xii., 14, A. viii., 15. Of a brilliant pea green in life, 

 Avithout ocellus on second dorsal, as described by the above authors. Soft 

 dorsal and anal; with narrow, blackish bars. Not probably specifically 

 distinct from specimens in Mus. A. N. Sci.,from South Carolina. 



AMBLOPLITES, Raf., Agass. 

 20. Ambloplites rupestris, Raf. 

 CentrarcJius mneus, Cuv. Val. 



Abundant in the French Broad and head of Cumberland ; none found 

 east of the AUeghenies. 



CH.ENOBRYTTUS, Gill. 



This genus, for which I have reserved the above name, is equally allied 

 to Lepomis and Ambloplites. It agrees with the first in its entire and 

 rather produced operculum, and three anal spines, but differs materially 

 in possessing the additional maxillary bone of the latter, CentrarcMm, Po- 

 moxys, etc. Gill defined it in consequence of its palatine and lingual den- 

 tition, characters which exhibit various grades of imperfection to entire 

 extinction in the typical Lepomes. Hence, in my view of fresh water 

 fishes from the Allegheny region of southwest Virginia, I united Lepomis, 

 Bryttus, and Chsenobryttus. I now discover the impoi'tance of the 

 presence or absence of. the additional maxillary bone, which, with the 



