220 FISHES. 



seasons; neck above scaly; D. XIII 12; A. II, 10. 

 Great Lakes and Western Streams, abundant, E. to L. 

 Champlain; the largest of the Darters, reaching a length 

 of six or eight inches. (P. zebra, semifasciata, nebulosa, 

 and bimaculata of authors.) 



2. P. manitou, Jordan. MANITOTJ DARTER. Head 

 notably shorter and broader than in P. caprodes; mouth 

 smaller and less inferior; fins larger; lateral bars shorter 

 and more blotch like, not meeting their fellows across 

 the back; space in front of dorsal fin entirely naked; 

 D. XV 14; A. II, 10. Indiana (Lake Manitou) to 

 Wisconsin. 



4. ALVORDIUS, Girard. BLACK -SIDED DARTERS. 

 (Etheostoma, Agassiz not of Raf.) 



1. A. maculatus, Grd. BLACK-SIDED DARTER. BLENNY 

 DARTER. Head long, pointed, 4 in length; depth 5 to 5J; 

 belly with a series of caducous plates along the middle 

 line (shed at some seasons.) Straw yellow, with dark 

 tesselations and about seven large blotches along the 

 sides, partly confluent, thus forming a inoniliform band; 

 D. XIII, to XV- 12; A. II, 9. Ohio Valley, Great Lakes 

 and eastward; one of the most curious and elegant of 

 all the Darters. (A. aspro, Cope & Jor. ? Alvordius 

 and Hadropterus maculatm, Grd. Etheostoma blen- 

 nioides, Ag.) 



2. A. pe/tatus, (Stauffer) Cope & Jordan. SHIELDED 

 DARTER. Head shorter; sides with broad, brownish 

 shades; ventral shields much larger; D. XII 13; A. I, 

 9; lat. 1. 53. Penn. 



3. A. macrocephalus, Cope. LONG-HEADED DARTER. 

 Head much elongated, 3J in length, the snout much 

 longer than the eye; cheeks and opercles naked; colora- 



