CAVE FISHES OF NORTH AMERICA. 



Measiircineiils. 



387 



Chologastcf cornufus Agassiz, Amer. Jour. Sci. and Arts, XVI, 1853, 135, Ditches of 

 rice fields in South Carolina. Giinther, Cat. Fishes Brit. Mus., VII, 2, 1868. 

 Piitnam, Amer. Nat., VI, 1872, 30. Jordan & Gilbert, Synopsis Fishes of N. A., 

 325, 1883. Gilbert, Bull. U. S. Fish Comm., VIII, 1888, 22 (Okefinokee Swamp, 

 Millen, Georgia). Jordan & Evermann, Fishes North and Mid. Amer., I, 703, 

 1896. Eigenmann, Degeneration of the Eyes of the Amblyopsida?, 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. 



Cholognster aiitiis Jordan & Jenkins, in Jordan Proc. U. S. Nat. ISIus., VIII, 1888, 

 356, pi. 44, fig. 8, Outlet of Lake Drummond, Dismal Swamp, near Suffolk, Va, 



Cliolog'aster papilliferus Forbes. PI. IV, fig. 2. 



The bod}' is similar in shape to that of C. cornutus. Depth about 

 6 ill length; head 3.5 to 3.75, not quite so depressed as C. corniitus; 

 mouth ver}" oblique, lower jaw projecting as much or more than width 

 of ej^e; maxillaiy scarcely reaching ej'e; ej^e 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 less united, 

 loosel}^ joined to the isthmus, reaching back to the vent; pectoral reach- 

 ing half wa^^ 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 

 ra^^s; scales very small, and arranged as in C. cornutus but somewhat 

 more numerous. Color similar to that of C cotmntus, 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; upper part 

 of head dark. Length 2 in. 



This species differs from the others of the genus in the strong devel- 

 opment of papillary ridges and in color. It is generally lighter than 

 C cornutus and darker than O. agassizii. Known only from Clinton 

 County, Illinois, in cave springs. 



