510 PROCEEDINGS OF THE ACADEMY OF [July, 



40. Curimatella alburnus australe var. nov. Blanquillo. 

 Type 9,929, one specimen (65). Asuncion. 



A single specimen differs from the typical northern alburnus in hav- 

 ing the predorsal region trenchant with a strong median and indistinct 

 lateral keels, and in having 33 scales in the lateral line instead of 

 36-38. It approaches var. lincafus in the number of scales, but has no 

 middorsal line. 



41. Curimatus gillii sp. nov. 



Type No. 9,939, 47 mm., Arroyo Trementina (242). 



Co-type No. 9,938, 57 mm., Chagalalina (2.30). 



These two small specimens represent apparently a new species 

 related to C. spilurus. It certainly differs from C. nasus and himacu- 

 Jatus the only other species of Curimatus that have been taken in the 

 Arroyo Trementina. 



Caudal lobes naked; postventral region rounded; sides in formalin 

 specimens with an obscm'e lateral band terminating in a large, well- 

 marked spot on the end of the caudal peduncle.^ Dorsal plain. 



Head 3^; depth 2|; Lat. line 30 or 31 ; I). 10 or 11 ; A. 9. 



Long elliptical, dorsal and ventral profiles equally arched. Pre- 

 ventral region flattened, with a median series of large scales; postven- 

 tral region rounded. Predorsal region narrow, rounded, a triangular 

 groove over the occipital process. 



Scales of the sides all crenulate. 



Profile gently arched; eye 3 in head, 1^ in interorbital. Origin 

 of dorsal midway between tip of snout and base of caudal in the type 

 and between tip of snout and tip of adipose in the co-tjqDe. Origin of 

 ventrals nearer caudal than tip of snout. Pectorals not to ventrals; 

 ventrals to anus. 



For Dr. Theodore Gill, in recognition of his valuable contributions to 

 the knowledge of the Characinoids. 



42. Curimatus nasus Steindachner. 



Two specimens from Arroyo Trementina (186), preserved in formalin, 

 have a plumbeous lateral band about as wide as the eye. 



43. Curimatus elegans paraguayensis var. nov. Mojarra. 



Type No. 9,928, one specimen (18 in part), 135 mm. Estaiicia la 

 Armonia, Arroyo Carumbey. 



Co-type No. 9,954, one specimen (87), 100 mm. Asuncion, Rio 

 Paraguay. 



^ The pigment cells of the lateral band are deeper in position than those 

 forming the caudal spot and would probably not be apparent in specimens pre- 

 served in alcohol. Certainly other specimens preserved in alcohol show no 

 band, while specimens in formalin show a band. 



