of Pceciliid Fishes, -109 



twice as distant from head as from base of caudal, or 2| to 

 2| as distant from eye. Anal 12-15, ending below anterior 

 part or middle of dorsal. Pectoral about f the length of 

 head, not extending to pelvics, which usually just reach the 

 vent. Olivaceous ; often with dark longitudinal stripes 

 between the series of scales ; males with 3 dark longitudinal 

 stripes on back from occiput and eyes to dorsal fin, which, 

 in the females, are broken up into series of spots that 

 generally extend transversely, forniing a zigzag pattern ; 

 vertical fins plain, the caudal and anal with lower edge 

 dark {S) or dorsal and caudal with series of small 

 spots ( ? ). 

 Colombia. 



1-10. 25-55 mm. R. Condoto, R. San Juan, Palmer, 



S.W. Colombia. 



6. Rivulus godmani. 



Itivulus godmani, Regan, Ann. & Mag. Nat. Hist. (7) xix. 1907, p. 65, 

 and Biologia Centr.-Am., Pisces, p. 82, pi. x. fig. 5. 



Depth of body 4| to 5 in the length, length of head 3|. 

 Head broader than deep. Diameter of eye 3 in the length 

 of head. 36 scales in a longitudinal series. Dorsal 8 ; 

 origin above posterior part of anal, 21 to 2j as distant from 

 eye as from base of caudal fin. Anal 11-12, ending below 

 middle of dorsal. Pectoral f length of head, not extending 

 to pelvics, which reach the vent. Olivaceous, marbled with 

 darker ; a dark spot on each scale ; operculum blackish ; 

 caudal with an ocellus ( $ ) or with a pale lower margin and 

 dark intramargiual stripe {S)- 



Guatemala. 



1-2 (types). 40 mm, Guatemala. Godman. 



7. Rivulus tenuis. 



Ci/nodonichtht/s tenuis, Meek, Publ. Columbian Mus. Zool. v. 1904, 



p. 101, fig. 27. 

 Hivulus tenuis, Regan, Biologia Centr.-Am., Pisces, p. 82 (1907). 



Depth of body 4| to 5 in the length, length of head 

 4 to 4i. Head broader than deep. Diameter of eye 3^ to 4 

 in length of head. 38 scales in a longitudinal series. 

 Dorsal 7-8 ; origin 2? to 3 times as distant from eye as 

 from base of caudal fin. Anal 11-12, ending below middle 

 of dorsal. Pectoral f length of head, not extending to 

 pelvics, which may reach vent. Olivaceous ; back and sides 

 sometimes marbled ; operculum blackish ; caudal with an 



