54 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. V 



concave arch; mouth rather large, nearly horizontal, the upper lip 

 on the level of the inferior margin of eye; lower jaw included; skin 

 of the lower jaw hard; teeth 2, 4-5, 2; eye small, 5 in head; gill 

 rakers rather weak; fins all long and falcate; pectorals reaching 

 ventrals; caudal deeply forked. 



Color bluish above, pale below. Length about 12 inches. 



46. Qila minacge Meek. BONY-TAIL. 



Gila minaccB Meek, Field Col. Mus. Pub. 65, 1902, 80; Minaca. 

 Headwaters of the Rio Yaqui. 



FlG. 11. GlLA MINAC/ Meek. 

 No. 3573, Field Columbian Museum. 



Head3f; depth 4| ; D. 9; A. 8; scales 24-90-11. Body elongate, 

 back not arched; snout bluntish; mouth terminal, rather large; 

 maxillary not; reaching anterior margin of pupil, its length 3^ in 

 head; snout 3^; diameter of eye 4^; body completely scaled; origin 

 of dorsal fin slightly behind base of ventrals, midway between base 

 of caudal and anterior margin of orbit; base of dorsal 2 in head, its 

 longest ray i> in head; the tips of the dorsal rays fall together 

 when the fin is defiexed and fall opposite to the middle of the base 

 of the anal fin; ventrals iX m head, their tips reaching vent; caudal 

 fin forked, its upper lobe the larger; lateral line complete, decurved, 

 its lowest portion over space between tip of pectorals and ventrals, 

 reaching axis of the body on posterior half of caudal peduncle; a 

 row of pores from nostril to nape; a second row on sides of head 

 under eye to near upper angle of opercle; caudal peduncle very 

 slender, nearly terete, its least depth 3^2 in the head. 



Color light olivaceous; a faint dark band from base of caudal 

 to opposite first dorsal rays; fins all plain ; a faint caudal spot. Length 

 of type 4.46 inches. 



