The inland fresh-water fishes are represented by Gronias nigrilabris Cope, a catfish from cave streams of eastern Pennsylvania, and by members of the Amblyopsidæ, concerning which a more detailed account is given below. THE AMBLYOPSIDÆ.--The Amblyopsidæ are a small family of fishes allied to the Cyprinodontidæ. They are found in the Mississippi drainage basin and in certain southeastern streams. Three of the members of the family, the Chologasters, are provided with well-developed eyes, while four other species are cave fishes in the strictest sense, being blind and colorless. The distribution of the different members of the Amblyopsidæ is as follows: [Illustration: FIG. 2.--The larva and adult of the Missouri cave salamander (_Typhlotriton_).] Chologaster cornutus is found in lowland swamps of the Southern States from the Dismal Swamp to the Okefinokee Swamp. Chologaster Agassizii is found in subterranean streams in Tennessee and Kentucky. Chologaster papilliferus has so far been found only in southwestern Illinois. Amblyopsis is abundant in the cave streams of the Ohio Valley south of the east fork of White River. Typhlichthys subterraneus inhabits the region south of the Ohio and east of the Mississippi. A single specimen of another Typhlichthys has been found north of the Ohio River in a well at Corydon, Indiana. Troglichthys rosæ inhabits the caves west of the Mississippi in Arkansas and Missouri. CHOLOGASTER.--Mr. E. B. Forbes secured a school of Chologaster papilliferus for me, and he wrote: “The little fishes were found under stones at the edges of the spring very close to the bluff, and when disturbed they swam back under the cliff.... None were found at any considerable distance from the face of the cliff.” I found the Chologaster Agassizii to act similarly in the river Styx, in Mammoth Cave. As soon as my net touched the water they darted in under the ledge of rock at the side of the little pool in which I found them. [Illustration: FIG. 3.--Blind salamander from an artesian well at San Marcos, Texas (_Typhlomolge_).]