304 L. Agassiz on Fishes of the Tennessee River. 
want of connection between the single suboperculum and the 
preoperculum forbids also a more intimate alliance with that fam- 
ily. orm of the ventrals of the Etheostomoids reminds 
us somewhat of those Gobioids in which the two ventrals are dis- 
tinct. Since the publication of the work. above mentioned, I 
have become acquainted with three new genera of tis family, 
for which [ would propose the names of Hyostoma, Catonotus, 
and Hadropterus. ; ‘ 
The more extensive knowledge I have acquired of this family 
by these recent accessions enables me to give more precisiou " 
the characters assigned at first to its genera; as follows: 
1. Erneostoma, Rafin.—Head elongated pointed ; mouth ve 
minal, widely open, not protractile, broad; jaws of equal length. 
Opercular apparatus and cheeks bare. First dorsal distinctly SeP- 
arated from the second. Anal and second dorsal smaller than the 
. first ti 1 ander the namie of Pecilosoma. 
ing however at the time of its publication far away from Cambridge, a0 d : 
consult my library or any other, | did not perceive that that name was lready pt 
occupied; I would therefore change it now to Peecilic ES Several new 
us 
* The genus Peeeilichth ys 
5 , . “ott; 
., remarkable for its “7a 
se , i the sides of the 0 
ig gh row, vith Gack ook lines oon Ss 
upon the sides of the tail; dorsals banded ‘with black, white and red. Tr 
species P. spectabilis, Another found by Dr. L_ Watson in small creeks baie 
Llinois, similar in color to the eceding but without black stripes along ¢ 
also less compressed. 4 | 
i . of 
collected = ery Geo. Stolley in the Osage River, Mo. 
d 
eall this species P. versicolor. apron toning pe ie 
were also received from River. A fourth species from the Osage ‘lack, tbe 
also discovered by Mr. Geo. Stolley, is of a greenish color mottled with dotted all 
second dorsal, the anal; the ventrals and the pectorals being ¢o"™ 
over with minute dark specks. J call this species P. punctulatus. oes 
