io8 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. V. 



Subgenus Fontinus Jordan & Evermann. 



96. Fundulus extensus Jordan & Gilbert. 



Fundulus extensus Jordan & Gilbert, Proc. U. S. Nat. Mus., 1882, 

 355; Cape San Lucas (probably from La Paz), Lower Cali- 

 fornia: Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 1896,646. 



Coast of Lower California. 



Head 3^; depth 5^; D. 15; A. 13; scales 12-47. Body usually 

 elongate, moderately compressed, head slender, not very broad, the 

 interorbital width i\ in head; mouth rather large; the teeth moder- 

 ate in a band, the outer considerably enlarged; eye large, 3^" in 

 head; origin of dorsal fin in front of anal, midway between eye and 

 base of caudal; pectoral 1^3 in head; caudal fin truncate; caudal 

 peduncle much longer than head. 



Color plain, somewhat translucent, with no markings anywhere, 

 except traces of some very narrow dark bars on the sides; fins low 

 and plain. (Jordan & Gilbert.) Known only from the types. 



97. Fundulus zebrinus (Jordan & Gilbert). 



Hydrargyra zebra Girard, Proc. Acad. Nat. Sci. Phila., 1859, 60; 



tributaries of Rio Grande, between Fort Defiance and Fort 



Union, New Mexico: Gunther, Cat., vi, 324, 1866: Jordan, 



Bull. U. S. Geol. Sur., 1878, 664; Brownsville, Texas. 



Fundulus zebrinus Jordan & Evermann, Bull. 47, U.' S. Nat. 



Mus., 1896, 646. 



Streams from the mouth of the Rio Grande north to western 

 Kansas, Dakota, Iowa, and Kentucky. 



Head 3^ to 3^; depth 4^ to 4^; D. 14 or 15; A. 13 or 14; scales 

 21-60. Body long and slender; head moderate; snout not much 

 elongate, its length 3^ in head; teeth in bands, the external series 

 much enlarged; eye 4 to 4% in head; interorbital width 2^ in head; 

 origin of dorsal fin midway between tip of snout and tip of caudal 

 fin; a little more anterior in the males; origin of dorsal fin opposite 

 that of anal in males, a little in advance in females; caudal fin trun- 

 cate; in males the margins of the scales are rough, with minute 

 tubercles. 



Color greenish above, side's and below silvery white, the sides 

 tinged with sulphur yellow; sides with 14 to 18 dusky bars from 

 back to ventral region, occasionally meeting on the ventral line; 

 these bars varying much in width, being rather narrower in females, 

 and with half bars usually between them; the interspaces as wide 

 as the bars or usually wider; fins usually dusky, plain. Length 

 about 3 inches. 



