LAMPEEY8 AND FISHES OF INDIANA. 235 



Family CYPKINODONTIDJi. 



Small fishes having the head and anterior region depressed, while the 

 hinder part of the body is compressed. Mouth terminal, small, the upper 

 margin formed by the premaxillaries only. Jaws well furnished with 

 teeth. Head scaly. Gill membranes free from the isthmus. Dorsal fin 

 situated well back. 



A large and widely extended family of fishes ; containing a large num- 

 ber of genera, of which we have representatives of two. 



Anal fin of male normal ; of 7-15 rays ; female not viviparous. 



F'lmdulus, p. 235. 



Anal fin of male much elongated and considerably in front of the 



dorsal ; viviparous fishes. Gambusia, p. 237. 



Genus FUNDULUS LaC. 



« 



Body elongated or not ; much or little compressed. Head flattened. 

 Mouth small, the jaws with si.nple pointed teeth arranged in more than 

 one row. Premaxillaries very protractile. Dorsal fin beginning in front 

 of, or behind the anal. 



As here defined the genus includes the species which are usually put 

 in the genus ZygonectfiS. Until definite characters separating the two can 

 be named, it seems to me better not to attempt to divide the species. 

 * Dorsal fin of twelve or thirteen rays ; sixteen or more cross-bars. 



diaphamcs, p. 235. 



** Dorsal of nine rays; a lateral black band. notatus, p. 236. 



**^ Dor. ^al of seven rays; sides with ten narrow dark stripes; males 



with about nine crossbars. dispar, p. 237. 



FuNDULUS DfAPHANUS (LeS.). 



Spring Minnow 



Jordan and Gilbert, 1882, 8, 334; Fundulus menona, op. cit., 335. 



Body elongated, compressed behind. Depth in the length nearly five 

 times. Head in the length four times, flat above. Dorsal rays thirteen; 

 anal rays eleven. Ventrals scarcely reaching the vent in the females ; 

 a little longer in the males. Scales along the side 40-48, about twelve in 

 a transverse row. Color olive, with silvery sides and fifteen to twenty- 

 five dark cross-bars. Some specimens (var. ? menona), probably males, 

 dark with about sixteen silvery cross-bauds on the sides. Length about 

 four inches. 



Jordan and Copeland have described {1, ^11 , 68) the species, menona, 

 which has since been regarded as simply a variety of diaphanus. It is 

 characterized by the possession of about sixteen shining silvery bars run- 

 ning across the sides. Dr. Smith (4, '92, 65) suggests that these are the 



