264 FISHES. 



1. Z. notatus, (Raf.) Jor. BLACK- SIDED KILLIFISH. 

 TOP MINNOW. 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. noiiii, Agassiz. STRIPED TOP MINNOW. A 

 broad band and several dotted lines along 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. 6; 

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



4. Z. di'spar, Ag. STRIPED MINNOW. Depth 4J in 

 length; head 3f ; 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^E. 



(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; 



