472 On the Fishes of the San Juan River, Colombia. 



to below anterior margin of eye ; depth of prseorbital 4 to 

 5 diameter of eye ; cheek with only 2 series of scales, rarely 

 a third series of 2 to 4 scales running upwards and back- 

 wards from behind angle of mouth to below eye ; prseopercle 

 scaleless ; 5 or 6 gill-rakers on lower part of anterior arch. 

 23 to 26 scales in a longitudinal series, 3 from first dorsal 

 spine and 1 or 1| from first soft ray to lateral line, 8 rows 

 below lateral line. Dorsal XV 9-10; fifth to twelfth spines 

 subequal, ^ length of head ; last spine § length of bead ; 

 soft fin pointed, extending to anterior part or middle of 

 caudal. Anal III 7-8. Dorsal and anal scaleless. Pectoral 

 nearly as long as head, extending to origin of anal ; pelvics 

 reaching anal. Caudal rounded. Caudal peduncle ^ to § 

 as long as deep. Uniformly dark or with dark longitudinal 

 stripes or series of spots along the rows of scales; paler 

 specimens with cross-bars, a lateral blotch, and a small spot 

 at base of caudal ; a blackish spot or ocellus on dorsal fin 

 between tenth and twelfth spines : often another in front 

 of and another behind it ; dorsal with pale edge and dark 

 intramarginal stripe ; soft dorsal spotted ; lower fins dark- 

 edged. 



Seven specimens, the largest 80 mm. in total length, from 

 the Rio Condoto (Spurrell). 



49. Cichlosoma (Par ape tenia) airomaculatum, Regan. 

 R. Condoto (Palmer, Spurrell) and R. San Juan (Palmer). 



50. Geophagus pellegrini, Regan. 

 R. San Juan (Palmer); R. Condoto (Spurrell). 



Atherinidae. 

 51. Thyrina guatemalensis, Giinth. 

 R. Condoto (Spurrell). 



Gobiida?. 

 52. Philypnus maculatus, Giinth. 

 R. San Juan (Palmer). 



53. Eleotris picta, Kner & Steind. 

 - R. San Juan (Palmer). 



