A REVIEW OF THE CENTRARCHIDA2. 
565 
Etymology: 9 Ept, an intensive particle; apyjxz, anus. 
This is a very doubtful species, but it may be retained provisionally 
as distinct, on the characters given in the key, which are those of the 
original type. Both the localities assigned to this species are probably 
erroneous. The original type was sent to the Indiana University by 
Dr. P. R. Hoy, purporting to have come froin the neighborhood of Mil- 
waukee. Another smaller specimen is in the National Museum, said 
to have been taken by Dr. Hoy in Tabo Creek, Missouri. Inasmuch as 
no other collector has obtained any Enneacantlius west of the Alleghany 
Mountains, it is probable that Dr. Hoy’s specimens came from some 
eastern locality. 
E. eriarchus is probably identical with E. gloriosus , the frequent 
variation in number of spines in the latter species being additional 
reason for so thinking. 
VIII. MESOGOMSTIUS. 
1864. Mesogonistius Gill, Amer. Journ. Sci. and Arts, 92 ( chcetodon ). 
Type : Pomotis chcetodon Baird. 
Etymology: Mieoq, middle; ywvza, angle; zWov, sail. 
ANALYSIS OF THE SPECIES OF MESOGONIST1US. 
a. Body suborbicular, compressed; head moderate; snout shorter than eye ; mouth 
very small; maxillary reaching to pupil; eye large, 3 to 3f in head; opercular 
spot much smaller than eye, with a crescent-shaped pale center; scales large; 
dorsal spines elevated, longest reaching just beyond eye; pectorals and ventrals 
reaching anal, ventral spine reaching anus. Clouded straw-color sides with 6 
to 8 conspicuous black irregular vertical bars, first through the eye, second in 
front of pectorals, interrupted ou the operculum, third at the front of the dorsal 
covering the membrane of the first three spines, aud forming a median black 
stripe on each ventral fin, the fourth at front of soft dorsal, fifth opposite its last 
ray, last at base of caudal ; fins mottled ; head, 3 to 3£ ; depth, If to If ; D. x, 10 . 
A. hi, 12; lat. 1., 28; L., 3 inches Chcetodon, 11. 
11. MESOGONISTIUS CHiETODON. 
(Plate lxx, fig. 2.) 
Pomotis chcetodon Baird, Ninth Smith. Rept., 324. 1854 (Cedar Swamp Cr., N. J.). 
Mesogonistius chcetodon Gill, Amer. Journ. Sci. and Arts, 92, 1864. 
Habitat: New Jersey to Maryland, only in sluggish streams near the 
coast. 
Etymology : Chcetodon , a genus of fishes, from yahr}, hair; o’Jwv, tooth . 
IX. LEPOMIS. 
1819. Lepomis Rafinesque, Journ. de Phvs., 402 ( auritus ). 
1819. Pomotis Rafinesque, Journ. de Phys., {auritus). 
1819. Apomotis Rafinesque, Journ. de Phys., 4' 10 
1820. Icthelis Rafiuesque, Ich. Oh., 27 ( 
1820. Telipomis Rafinesque. Jr\ . • . - • . 
1831. Bryttus Cuv. & Vai 
1876. Helioperca Jordan, •. v \ ' . 
