264 FISHES. 



1. Z. noiatus, (Raf.) Jor. Black -Sided Killifish. 

 Top Mixxow. Depth 4^ in length; head 4; head broad, 

 depressed; clear pale olive with a few dots above; a 

 wide purplish-black band along sides from snout through 

 eye to caudal, its margin usually serrated; D. 9; A. 11; 

 lat. 1. 34; length 2^ inches. Miss. Valley; abundant 

 {Z. pulchellus and tenellus^ Grd., F. aureus^ Cope, Z. 

 olivaceus^ Ag.^ etc.) 



** Body short, deep, much compressed. {Micristius, Gill.) 



2. Z. nottii, Agassiz. Striped Top Minnow. A 

 broad band and several dotted lines alono: sides; the 

 darker continuous bands alternating with fainter inter- 

 rupted ones; males transversely banded; silvery below. 

 Mississippi Valley and Southern streams. 



3. Z. melanops, (Cope) .Jordan. Yellowish brown; 

 belly golden; a black spot below eye; fins dotted; D. G; 

 A. 8; lat. 1. 31. Neuse R. to Illinois. 



4. Z. dispar, Ag. Striped Minnow. Depth 4^ in 

 length; head of; the width of interorbital space f length 

 of head; the width between the eyes above nearly twice 

 as great as below; snout broadly rounded; fins small; 

 D. 7; A. 9; lat. 1. 34; color bluish, each scale with a 

 bronze spot forming very regular longitudinal lines, 

 which are very distinct; males with dark cross bars; 

 very small; L. 1^. Rivers and lakes of Indiana and 

 Illinois, a singular and handsome species. 



FAMILY 01.— UMBRID^. 



{The Mud Minnows.) 



Small fishes like the Cyprinodonts in most respects, 



but with the mouth different; margin of upper jaw 



formed by the intermaxillaries mesially and by the max- 



illaries laterally; head and body scaly; no lateral line; 



