South- American Char acid Fishes. 39;^ 



Synopsis of the Species. 



I. Depth of body less than |- of the length ; caudal peduncle nearly as 

 lonuf as head ; origin of dorsal fin well behind base of pelvics. 



A. Origin of dorsal fin nearer to base of caudal than to head. 



1. arnoldi. 



B. Origin of dorsal fin equidistant from head and base of caudal, or 



a little nearer head. 



21 scales in a longitudinal series 2. callolepis. 



23 or 24 scales in a longitudinal series 3. eigeninanni. 



26 scales in a longitudinal series 4. carsevennensis. 



II. Depth of body not less than \ of the length ; caudal peduncle 

 considerably shorter than head. 

 Origin of dorsal fin a little behind base of pelvics . . 5. gutiata. 

 Origin of dorsal fin above base of pelvics 6. argyrops. 



1. Coptina arnoldi, sp. n. 



Deptli of body 4^ to 4f in the length, length of head 4| to 

 5. Caudtvl peduncle nearly as long as head. Snout shorter 

 than diameter of eye, which is 3^ in the length of head ; 

 interorbital width 2\. 23 or 24 scales in a longitudinal 

 series. Dorsal 10; origin nearer to base of caudal tlian to 

 head. Anal 11. Olivaceous; a dark stripe from eye round 

 lower jaw ; a blackish spot on dorsal tin. 



Amazon. 



1-2. 30-40 mm. (types). Amazon, Arnold. 



2. Copeina callolepis, sp, n. 



Pyrrhulina nattereri (non Steind.), Eigenm. & Eigenm. Proc. Calif. 

 Acad. (2)ii. 1890, p. 112. 



Depth of body 4^ to 5 in tlie length, length of head 4^. 

 Caudal peduncle nearly as long as head. Snout sliorter than 

 diameter of eye, which is 3 in length of head ; interorbital 

 width 2^ to 2^. 21 scales in a longitudinal series. Dorsal 

 10 ; origin equidistant from head and base of caudal, or 

 slightly nearer the former. Anal 11. Olivaceous; a dark 

 stripe from lower jaw to eye continued as a dusky band on 

 lower part of body ; a pale spot on each scale, except below 

 the band ; a black spot on the dorsal fin. 



Amazon. 



1-2. 35-40 mm. (types). Amazon. Arnold. 



3. Copeina eigenmanniy sp. n. 

 Depth of body 4:^ to 5 in the length, length of head 4 to 4^. 

 Ann. & Mag. N. Hist. Ser. 8. Vol. x. 27 



