502 COXTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
nectecl. Lateral line straiglit, prolonged forwards to tbeeye. Opercles 
with rather large scales 5 cheeks covered with very small ones, which 
are scarcely visible; breast naked; neck naked, or more or less scaly; 
body otherwise entirely scaly, the scales small and rough. Straw-yel- 
low or greenish, with dark tessellations and marblings above, and about 7 
large dark blotches along the sides, which are partly confluent, thus form- 
ing a moniliform baud ; tins barred. Head 4 ; dex)th 6 . D. XIII to XV- 
12 ; A. II, 9 ; scales 9-G5-17. Ohio River to the Upper Missouri, chieflj" 
northward; one of the most curious and elegant of the darters. Its 
coloration varies much in intensity with differences in surroundings. 
Specimens from the Ohio Valley slenderer than the tyiiical form, with 
narrower head, scaly neck and iialer colors, form a slight varietj’ aji- 
proaching A. phoxoceplialus. 
(Etheostoma blentiioides Kirtlaud, Bost. Journ. Nat. Hist. 1839, 340 — not of Rafinesqne : 
Etheostoma hlennioides Vaillaut, 1. c. 57 ; Cope & Jordan, Proc. Acad. Nat. Sci. Pliila. 
1877, 51: Ah'ordius maculatiis Jordan, Man. Vert. ed. 2, 220, probably not of Girard, 
who describes the head as scaleless.) 
7§4. A. iiei'isoiasis (Cope) Jor. 
“ This is an elongate fish, with muzzle obtuse in profile, as well as wide, 
viewed from above. Cheeks, operculum, and middle dorsal line scaled. 
Ventral line without spinous scales ; one only being present in the sym- 
physis of the ‘coracoids’. Anal fin with base a little shorter than spi- 
nous dorsal; the species may really be a Pcccilichthys. First dorsal 
moderately elevated ; second, peculiar in spinous ray, well separated 
from the first dorsal. Caudal flu slightly forked. Ground color above 
yellowish, crossed by 9 dark chestnut quadrate spots on the median line, 
which are wider than their interspaces and are connected at their ends 
by an undulate chestnut band. Below the latter a similar longitudinal 
baud on the anterior half of the body. Six quadrate black spots on the 
sides, with a small spot between each. A dark band from end of muz- 
zle to scapula ; below it on operculum, a silver spot. A black bar below 
eye. Belly white. Caudal and second dorsal distinctly, pectoral and 
ventral faintly black barred. A series of black si)ots along middle of 
first dorsal.” Head 44 ; depth D. XHI-I, 12 ; A. H, 8 ; scales 8-53- 
11. L. 3^. [Cope.) Maryland to North Carolina. 
[Hadropterus maculatiis* Grd, Proc. Acad. Nat. Sci. Phila. 1859; not Alv. maculatus 
Grd. : Etheostoma nevisense Cope, Proc. Amer. Philos. Soc. Phila. 1870, 2fil.) 
bbb. Cheeks naked ; opercles scaly above only ; space before dorsal naked ; muzzle blunt. 
d. Ventral shields moderate; colors dull, plain. 
*The types of this sjiecies, lately examined by us, seem to be identical with A. nevi- 
sensis ; cheeks with rather large scales; middle of breast with scales; ventral plates 
large. Scales 7-56-12. D. XIV-12 ; A. II, 9. Maryland. 
