508 A Revision of PoeciUid Fishes. 



24 ; orij^in considerably nearer to end of snout than to bsae 

 of caudal ; middle rays as long as longest of dorsal. Pectoral 

 as long as postorbital part of head, extending beyond origin 

 of anal. Brownish, with indistinct cross-bars ; a dark bar 

 below eye ; small pale blue spots on dorsal and anal fins. 

 La Plata. 



1 (type). 92 mm. San Antonio. Gibson. 



6. Cynolebias bellottii. 



Ci/nolebias bellottii, Steind. Denkschr. Akad. Wien, xliv. 1882, p. 9, 

 pi. V. fig. 3; CTarniati, Mem. Miis. Comp. Zool. xix. 1897, p. 144. 



Depth of body 2^ to 3 in the length, length of head 3^ to 

 3§. Caudal peduncle deeper than long. Diameter of eye 4 

 in the length of head. 28 to 30 scales in a longitudinal 

 series. Dorsal 21-24 ; origin nearly equidistant from end 

 of snout and base of caudal ; posterior rays longest, ^ to § 

 length of head. Anal 26-30 ; origin about equidistant from 

 end of snout and end of its own base ; middle rays as long as 

 longest of dorsal. Pectoral | or | length of head, extending 

 beyond origin of anal. Brownish; a dark vertical stripe 

 through eye ; fins violet ; vertical series of pale spots some- 

 times present on body and fins. 



La Plata. 



1-2. Co mm. La Plata. Dovia. 



3. Skel. 

 4-5. 65-60 mm. ,, Arnokl. 



7. Cynolebias nigripinnis, sp. n. 



Depth of body 3^ in the length, length of head 3|. 

 Caudal peduncle nearly as long as deep. Diameter of eye 

 31 in the length of head. 28 scales in a longitudinal series. 

 Dorsal 26 ; origin a little nearer to end of snout than to 

 posterior end of its own base. Anal 25 ; origin a little 

 behind that of dorsal. Dorsal and anal rays increasing in 

 length posteriorly, the longest f the length of head. Pectoral 

 a little shorter than head, extending beyond origin of anal. 

 OUvaceous ; a dark bar between and below eyes ; fins bluish 

 black ; some small pale spots on body and fins. 



La Plata. 



1 (type). 45 mm. La Plata. Arnold. 



