266 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



CC. No humeral spot (Western Peru and Ecuador). 



G. Dorsal behind ventrals ; snout about 4 in the head ; 

 interorbital convex. A. 26-30, beginning under last 

 ray of dorsal ; depth 3-35 ; head 3I-4. Scales 6 

 or 7-36 to 40-7 ; 2 or 3 maxillary teeth. A silvery 

 lateral band which may become black on the caudal. 



28. siinus (Boulenger). 

 GG. Head 3I-4J ; depth 2I-3 ; interorbital much 

 more than diameter of the eye. Maxillary termin- 

 ates below the anterior margin of the eye, with 2 

 teeth ; origin of dorsal behind the ventrals. A. 

 26-30 ; scales 6-35 to 37-6 to 8. 



29. peruanus (Miiller & Troschel). 

 BB. Caudal spot not continued on the middle rays.' 



H. Scales in 15 rows, 7-36-7; A. 27-31 ; depth more than 

 3 in the length ; eye 3.66 in the head, much smaller 

 than the convex interorbital ; a humeral spot and a cau- 

 dal spot. 30. huniilis (Giinther). 

 HH. Scales in 10-14 rows ; lateral line 34-38. 

 /. Head 4 or less than 4 in the length. 



/. A humeral spot ; maxillary reaching anterior 

 border of eye, not to end of first suborbital ; 

 head 3.75-4; depth 2.4-2.7; A. 23-28; 

 scales 6| or 7J-34 to 37-5J to 6J. Two or 

 three maxillary teeth. 



3 1 . fisclieri (Steindachner). 

 JJ. Ma.xillaiy ceases in front of the vertical from 

 the pupil, and end of first suborbital. Dorsal 

 considerably behind origin of ventrals ; pec- 

 torals reaching beyond ventrals. Eye about 

 equal to the slightly convex interorbital, 3 in 

 the length of the head. Depth 2f ; head 

 3| ; A. 26 ; scales 6I-37 or 38-5 ; a 

 humeral spot. 32. carolince (Gill) 



II. Head 4 or less in the length. Scales 5^-35-4 

 Anal, dorsal and caudal fins with red markings 

 Caudal and humeral spots indistinct. Head 4.2 

 depth 3.75 ; A. 25-29. 33. phceiiicopterus {Copt) 

 yy. No caudal spot ; ^ a humeral spot. 



K. Maxillary with three small teeth; eye 2.3 in head, snout 4. 5, the 

 flattish interorbital 3 ; depth 2.66 ; head 3.6 ; A. 28 ; scales 5- 

 35-4 ; a silvery lateral band, a vertical humeral spot. 



34. inegalops (Eigenmann & Ogle). 



' Not examined in carolince and humilis. 

 ^ Not stated for baJiiensis. 



