1870. ] 451 * Riiépe: 
17. Microprervus NIGRIGANS, Cuv. 
The green bass is abundant in all the rivers of the State. I have it from 
the Neuse, Yadkin, Catawba, upper 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 8.25 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 HExacantuvs, C. V. 
Neuse River. 
Numerous specimens of this species and the Pomozys storerius from 
Leavenworth, on the Missouri River, from Saml. H. Edge. 
CENTRARCHUS, C. V. 
19. CENTRARCHUS IRIDEUS, Cuv., Val. 
Vol. III., p. 89, Holbrook Ichth. 8. 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, 
without ocellus on second dorsal, as described by the aboveauthors. 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. 
Centrarchus eneus, Cuv. Val. 
Abundant in the French Broad and head of Cumberland ; none found 
east of the Alleghenies. 
CHANOBRYTTUS, Gill. 
This genus, for which I have reserved the above name, is equally allied 
to Lepomis and Ambiloplites. 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, Centrarchus, Po- 
mozys, 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 Cheenobryttus. I now discover the importance of the 
presence or absence of the additional maxillary bone, which, with the 
