324 COXTRIBTTIoys TO NORTH AMERICAN ICHTHYOLOGY IV. 



Head naked, tin- surface sometimes crossed by papillary ridges. I.ody 

 with small cycloid scales, irregularly placed. No lateral line. Vent 

 jugular, close behind the gill-openings. Ventral fins small or wanting; 

 pcci orals moderate, inserted higher than in most soft-rayed fishes; dor- 

 sal without spine, nearly opposite the anal; caudal truncate or rounded. 

 i 'i anium without median crest. Stomach coecal, with one or two pyloric 

 appendages. Air-bladder present. Ovary single. Some (and probably 

 all) of the species are ovoviviparous. lu two of the genera the eyes are 

 very rudimentary and hidden under the skin, and the body is translu- 

 cent and colorless. Fishes of small size, living in subterranean streams 

 and ditches of the Central and Southern United States. 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 coast will undoubtedly be found to be the home of numerous indi- 

 viduals, and perhaps of new species and genera, while the subterranean 

 streams of the central portion of our country most likely contain other 

 species." (Putnum.} 



(//(>//)//'/;/ (iiintiuT. vii, 1, 2.) 



a. Eyes rudimentary, concealed : body colorless. 



/;. Ventral (ins present AMBLYOPSIS, 1 .'.:!. 



lih. Velllral lilis obsolete TVPHLICIITIIVS, l.")|. 



aa. K\ es developed ; body colored ; vent nils obsolete CiiOLOGASTEit, 155. 



153. AMBL,YOP1S DoKay % 



(DeKay, New York Fauna, Fish. 1842, 187: type AmMyopsis spclams DeKay.) 



! ACS rudimentary, concealed under the skin. Surface of head crossed 

 by vertical tactile ridges, dill-membranes fully joined to isthmus. Ven- 

 tral lius present, quite small, close to anal. Colorless fishes of small 

 si/e, inhabiting the cave-streams in the limestone regions of the West- 

 ern States. (<///, j /.>-, obtuse; Y'^j vision.) 



.V2O. A. S|M'l;rilS DelCay. 



Colorless. .Mouth comparatively large, the length of its cleft about 

 eipial to base of dorsal. Pectorals reaching front of dorsal; caudal 

 long, rather pointed. One p\ loric ciecnm. Head '.'> in length; depth 



II. !>.!; A. S; V. I: P. 11. L. 5 inches. Subterranean streams of 



Kentucky and Indiana. 



(DeKay. \e\v York l-':iiiii:i. Fi-h. 1-7: < i ii :il her, vii.'J; rntnain, Anier. Nat. 1872, 

 30, ii'..) 



l.ll.-TVPIII.ICIITIIVS Cir..rd. 



(Ciranl. Pio-. Aead. Nat. Sei. 1'liila. l-.'i'.', f.J: type Ti/j>ltH<hl]n/a sulterranens Crd.) 



This genus differs from Amblijopsis only in the absence of the ventral 



