162 Annals of the Carnegie Museum. 



the bases of the first nine anal rays. Lateral line with pores developed 

 on the first five to nine scales. Origin of the dorsal equidistant from 

 the snout and the caudal; penultimate ray about one-fifth of the 

 highest, which is 3.67 in the length. Caudal very little longer than 

 the head. Origin of anal on the vertical from the last dorsal ray. 

 Anal deeply emarginate, the longest ray 1.25 in the anal base. Ven- 

 trals on the vertical from the first scale in front of the dorsal. Ven- 

 trals reaching the second to fourth anal ray. Pectorals reaching to 

 the first scale in front of the ventrals or to the second scale behind the 

 ventrals. No humeral spot. Caudal spot not quite as wide as the 

 caudal peduncle, but extending from the tips of the middle caudal rays 

 to the vertical from one of the last five anal rays, more diffuse at the 

 anterior end. Lateral stripe very faint, heavily overlaid with silvery. 

 Fins all a little dusky. Scales of the back outlined with dusky. 

 Cheeks and sides below the lateral stripe with bluish iridescence. 



20. Hemigrammus levis Durbin. 



Two specimens, 31 to 38 mm. C. M. No. 3088. Santarem. 



21. Hemigrammus ulreyi (Boulenger). 



One specimen, 39 mm. C. M. No. 3048. From a slough near Petas, Bolivia. 



Four specimens, 38 to 41 mm. C. M. No. 3049. Caceres. 



Sixteen specimens, 35 to 44 mm. C. M. No. 3050. Jaurii. 



Four specimens, 38 to 42 mm. C. M. No. 3051. Rio Santa Rita. 



22. Hemigrammus coeruleus Durbin. 



Three specimens, 49 to 58 mm. C. M. No. 3052. Manaos. 



23. Hemigrammus unilineatus Gill. 



Twenty-four specimens, 27 to 48 mm. C. M. No. 3043. Braganca. 

 Nine specimens. 31 to 38 mm. C. M. No. 3044. Maciel, Rio Guapore. 



24. Hemigrammus rodwayi Durbin. 



Six specimens. 31 to 40 mm. C. M. No. 3045. Braganca. 

 One specimen?; 27 mm. C. M. No. 3049. Above Cachoeira, Rio Nova, 

 Gagaz Piabana. 



25. Hemigrammus ocellifer (Steindachner). 

 Eleven specimens, 31 to 40 mm. C. M. No. 3046. Braganca. 



26. Hemigrammus lunatus Durbin. 



Five specimens, 24 to 45 mm. C. M. No. 3081. Caceres. 

 Two specimens, 46 and 48 mm. C. M. No. 2942. Jaurii. 

 Two specimens, 45 and 48 mm. C. M. No. 2943. Rio Boa Ventura. 



