CAVE FISHES OF NORTH AMERICA. 387 
Measurements. 
! 
No. | Head. ; Depth. | Dorsal.| Anal. | Seales. | Length. Notes. 
1 3.5 6 8 8 66 33 vee Swamp. 
2 3.33 5. 25 (?) 9 63 25 | Do. 
Ol ere eee eee sae 9 el eeserecror lseacecc cee | Dismal Swamp (mutilated). 
4 3 5,5 9 SEA ceases 30 | Cotype of C. avitus. 
5 3 5.5 9 Sn eeoeseee 19 
Chologaster cornutus Agassiz, Amer. Jour. Sci. and Arts, X VI, 1853, 135, Ditches of 
rice fields in South Carolina. Gunther, Cat. Fishes Brit. Mus., VII, 2, 1868. 
Putnam, Amer. Nat., VI, 1872, 30. Jordan & Gilbert, Synopsis Fishes of N. A., 
325, 1883. Gilbert, Bull. U. 8. Fish Comm., VIII, 1888, 22 (Okefinokee Swamp, 
Millen, Georgia). Jordan & Evermann, Fishes North and Mid. Amer., I, 703, 
1896. Eigenmann, Degeneration of thé Eyes of the Amblyopside, its Plans, 
Processes; and Causes, Proc. Ind. Ac. Sci. 1898, 239 (summary); Eyes of the 
Blind Vertebrates of N. Amer., Arch. f. Entwickelungsmech., VIII, 1899, 543; 
Marine Biological Lectures, 1899 (1900), 113. 
Cholegaster avitus Jordan & Jenkins, in Jordan Proc. U. S. Nat. Mus., VIII, 1888, 
356, pl. 44, fig. 8, Outlet of Lake Drummond, Dismal Swamp, near Suffolk, Va. 
Chologaster papilliferus Forbes. Pl. IV, fig. 2. 
The body is similar in shape to that of C. cornutus. Depth about 
6 in length; head 3.5 to 3.75, not quite so depressed as C. cornutus; 
mouth very oblique, lower jaw projecting as much or more than width 
of eye; maxillary scarcely reaching eye; eye 2 in snout, located rather 
on upper side of head; head and body with papillary ridges which 
serve as tactile organs, these highly developed in some specimens and 
‘almost entirely absent in others; gill:membranes more or Jess united, 
loosely joined to the isthmus, reaching back to the vent; pectoral reach- 
ing half way to dorsal; caudal pointed; dorsal inserted well back, its 
first ray a little-in front of first ray of anal, rays 8 to 9; anal with 8 
rays; scales very small, and arranged as in C. cornutus but somewhat 
more numerous. Color similar to that of C. cornutus, but the dark 
longitudinal lines not so well defined; a light lateral line just below 
the median dark line; no well-defined black blotches on base of caudal; 
belly white; dorsal fin dark, similar to caudal; anal light; wpper part 
of head dark. Length 2 in. 
This species differs from the others of the genus in the strong deyel- 
opment of papillary ridges and in color. It is generally lighter than 
’, cornutus and darker than C. agassizii. Known only from Clinton 
County, Illinois, in cave springs. 
