122 Field Columbian Museum — Zoology, Vol. V. 



Characodon garmani Jordan & Evermann, Bull. 47, U. S. Nat. 

 Mus., 1898, 2831. 



Spring and headwaters of the Rio Mezquital near Durango, spring 

 at Labor and the Rio Nazas at Parras. (Durango; Labor.) 



Head 3^; depth 2^ to 3; D. 13; A. 13; scales 13-33. Body 

 robust, somewhat compressed; snout short, 4 in head; lower jaw the 

 longer, chin prominent; diameter of eye 3^; interorbital area 2% in 

 head ; origin of dorsal to base of caudal about 2 y A in its distance from 

 tip of snout; origin of anal slightly in advance of that of dorsal; pec- 

 toral fin 2 in head ; ventrals 3 y^ ; caudal fin rounded ; least depth of 

 caudal peduncle 2 in head. 



Color olive reddish to light brownish; males uniform or with bars 

 on caudal peduncle, sides of females more or less barred or blotched 

 and lighter in color than males; usually on sides a dark broad lateral 

 band, more broken up in bars on females than on males; on males the 

 dorsal and caudal fins with a dark band near tip bordered with lighter ; 

 in life the larger males red, occasionally males with only one or two 

 black blotches on the sides; the color very variable. Length about 

 1^2 inches. 



The young are born early in June. It is quite probable that the 

 specimens described by Prof. Garman are from Durango instead of 

 Parras. '"• 



111. Characodon furcidens Jordan & Gilbert. 



Characodon furcidens Jordan & Gilbert, Proc. U. S. Nat. Mus., 

 1882, 354' Cape San Lucas, Lower California: Garman, Memoirs, 

 Mus. Comp. Zool., xix, 1895, 36 ; Cape San Lucas (probably from 

 the lagoons at La Paz): Jordan & Evermann. Bull. 47, U. S. 

 Nat. Mus., 1896, 670; Cape San Lucas; Colima: Pellegrin, Bull. 

 Mus. Hist. Nat. Paris, 1901; Rio San Pedro, Tuxpan, Jalisco. 

 Lowland streams of Jalisco and Colima and the southern portion 

 of Lower California. 



Head 4; depth 3*; D. 15 to 17; A. 13; scales about 15-50. Bodv 

 comparatively elongate, not much compressed, the head rather low 

 and broad, depressed, interorbital area slightly more than two in head, 

 anterior teeth large, firmly fixed and bicuspid; a band of minute teeth 

 behind them; eye rather large, t> 1 A m head, origin of dorsal fin mid- 

 way between base of caudal and pectoral ; origin of anal under seventh 

 dorsal ray ; pectoral fin r % m head ; ventral fin 2 ; caudal fin obliquely 

 truncate, very slightly emarginate; caudal peduncle comparatively 

 long and slender. 



Color of males profusely mottled with darker; sometimes nearlv 

 plain; vertical fins each with several brownish bars or blotches and 



