85. PERCID^E ETHEOSTOMA. 
513 
being so different in respect to tbe form of tbe mouth, that he conceived that they 
might belong to different subgenera. The etymology of the word is not evident.) 
a. Head entirely naked; lateral line short; lower jaw prominent. 
b. Body with longitudinal dark stripes. 
8 J3. E. liaaeolaJBBiBii (Ag.) Jot.— Striped Darter. 
Body elongate, compressed, the back scarcely arched. Head long 
and rather pointed, entirely destitute of scales. Mouth rather large, 
terminal, oblique, the lower jaw the longer. Eye moderate, longer than 
the snout, about 4 in head. Opercular spine strong. Fins all low, the 
first dorsal in the males about half as high as the second; higher in the 
females; caudal large, rounded. Anal spines longer in females than in 
the males; dorsal and anal spines pointed in the female, in the male with 
thickened fleshy tips. Scales moderate. Lateral line extending about 
to end of first dorsal. Neck and throat naked ; scales on sides extending 
nil to the base of the dorsal fin. Color dark; each scale with a dark 
spot, these forming a series of conspicuous longitudinal lines along the 
rows of scales; second dorsal and caudal conspicuously cross-barred; 
head blackish, with dark stripes radiating from eye; males further 
marked with consiucuous dark cross bars. Head 4; depth 5. 13. VIII- 
12; A. II, 8; scales 7-53-7. L. 2^ inches. Minnesota to Indiana; abound- 
ing in clear or rocky streams; one of the most singular and handsome 
of the darters. 
{Catonotns lineolatus Agsmsiz, Amer. Joum. Sci. Arts. 1854, 305: Catonotus Uneolatus 
Vaillaut, 1. c. 118. ) 
hb. Body uot striped. 
804. E. flabelBas'e Raf. 
Very similar to the preceding, but rather more elongate and less 
compressed. Head rather larger. A narrow strip along base cf siiinous 
dorsal uot scaled. Coloration paler, there being little or no trace of the 
longitudinal stripes, so conspicuous in E. lineolatum ; the males with cross 
blotches, the temales nearly i)laiu olivaceous; second dorsal and caudal 
fins barred; b'ack humeral spot conspicuous. Lateral line usually veiy 
little developed; lower jaw less projecting than in LJ. lineolatum. Head 
4; depth 5. D. VIII-12; A. II, 8 ; Lat. 1. 46. Length 2J inches. West- 
ern New York to Ohio Valley ai.d North Carolina; very abundant in 
the tributaries of Lake Ontario. 
(Riifinesque, Jouru. de Pbys. etc. Paris, 1819, 419: Catonotus flabeUaius Vaillaut, 
Recbercbes, 1873, 191 : Catonotus fasciatus Girard, Proc. Acad. Nat. Sci. Phila. 1859, (57 : 
OUgocephalus hunieralis Girard, Proc. Acad. Nat. Sci. Phila. 1859, G6: 1 Catonotus 
Bull. Nat. Mus. No. 16 33 
