268 FISHES. 



6. . salmoneus, Raf. LITTLE PICKEREL. WESTERN 

 TROUT PICKEREL. Size and general form of preceding 

 or slenderer; olivaceous green above; white below; sides 

 with many reticulations and curved streaks, instead of 

 bars; a black streak in front of eye as well as below; 

 B. 12; D. 13; A. 14; lat. 1. 112. Western streams, abund- 

 ant in the Ohio Valley. (E. umbrosus, Kirtland.) 

 Resembles reticulafau more than americanus. 



FAMILY CIIL AMBLYOPSID^E. 



(The Cave Fishes.) 



Fishes with the ventral fins rudimentary or wanting; 

 the vent jugular, in front of the pectorals, and the eyes 

 sometimes rudimentary and concealed under the skin; 

 margins of upper jaw formed by intermaxillaries alone; 

 head naked; body with small, cycloid scales, irregularly 

 arranged; no lateral line; villiform teeth on jaws and 

 palate; dorsal far back, opposite anal; stomach coecal, 

 with pyloric appendages; some (and probably all) vivi- 

 parous. 



Fishes of small size living in subterranean streams and 

 ditches of the central and southern U. S. Three genera 

 and four species are "all of the family yet known, but 

 that others will be discovered and the range of the 

 present known species extended is very probable. The 

 ditches and small streams of the lowlands of our South- 

 ern Goast will undoubtedly be found to be the home of 

 numerous individuals, and perhaps of new species and 

 genera, while the subterranean streams of the central 

 portion of our country most likely contain other species." 

 (Putnam.) 

 * Eyes rudimentary, concealed under the skin ; body colorless. 



Ventrals present, small. . . . AMBLYOPSIS, 1. 



Ventrals entirely wanting. . . TYPHLICHTHYS, 2. 



