502 CONTRIBUTIOXS TO NORTH AMERICAN ICHTHYOLOGY IV. 



neeted. Lateral line straight, ijrolonged forwards to the eye. Opercles 

 with rather large scales ; cheeks covered with very small ones, which 

 are scarcely visible; breast uaked; 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 mouililbrm batid ; lins barred. Head 4 ; depth 6. D. XIII to XY- 

 12 ; A. II, 9 ; scales 9-05-17. Ohio River to the Upper Missouri, chiefly 

 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 typical form, with 

 narrower head, scaly neck and paler colors, form a slight variety ai^- 

 proaching A. phoxocei)halus. 



{Etheostoniahlennloides Kirtland, Bost. Joiirn. Nat. Hist. 1839, 340 — notof Rafinesqiie: 

 Ethcostoma hlenniokles Vaillaut, 1. c. 57 ; Cope &. Jordan, Proc. Acad. Nat. Sci. Phila. 

 1877, 51: Ali'ordius viaculatiis Jordan, Man. Vert. ed. 2, 220, probably not of Girard, 

 who describes the head as scaleless.) 



784. A. nevflseaisis (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 si^i- 

 nous dorsal; the species may really be a Pa'cilichthys. First dorsal 

 moderately elevated ; second, peculiar in spinous ray, well separated 

 from the first dorsal. Caudal fin 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 

 band 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 4^ ; depth 4f. D. XIII-I, 12 ; A. II, 8; scales 8-53- 

 11. L. 3|. {Cope.) Maryland to North Carolina. 



(Radropterus maciilatus* Grd, Proc. Acad. Nat. Sci. Phila. 1859; not Alv. maculatus 

 Grd. : Elheosioma nevisense Cope, Proc. Amer. Philos. Soc. Phila. 1870, 2'ol.) 

 hbb. Cheeks uaked ; opercles scaly above only ; space before dorsal naked ; muzzle blunt. 

 d. Ventral shields moderate ; colors dull, plain. 



*The types of this species, 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. 



