II. OX THE SPECIES OE HASEMANIA, HYPHESSO- 



BRYCON, AND HEMIGRAMMUS COLLECTED BY 



J. D. HASEMAN FOR THE CARNEGIE MUSEUM. 1 



By Marion Durbin Ellis. 



(Plates I— III.) 



Genus Hasemania gen. nov. 2 

 (Type, Hasemania melanura spec, nov.) 

 A Tetragonopterid, with two rows of premaxillary teeth, the 

 maxillary without teeth, or with a few teeth in its upper angle, 

 the lateral line incomplete, the caudal naked. No adipose fin. 

 Like Hyphessobrycon, but without an adipose. Pectoral frequently 

 archaic in small specimens. 



a. Maxillary equal to the eye, with two small tricuspid teeth. Premaxillary 

 teeth narrow, tricuspid, or conical. Snout sharp; interorbital narrow, 

 less than the eye, 4 in the head. D. n; A. 19; scales 7-32-5 or 6. 



maxillar.is sp. nov. 



aa. Maxillary less than the eye, elliptical, without teeth. Teeth in the inner row 



of the premaxillary with more than three points. Interorbital 3, or less, 



in the head. 



b. Snout short and blunt. Dentary with four or five five- or six-pointed teeth. 



A distinct blackish caudal spot extending to the tips of the middle 



caudal rays. D. n; A. 16 to 18; scales 6-33 to 36-5. . .melanura sp. nov. 



bb. Dentary with three broad, chisel-shaped, eight- or nine-pointed teeth. No 



distinct caudal spot; a heavy black lateral stripe; another black stripe 



along the under side of the caudal peduncle, extending to the base of 



the last anal ray, and continued in a straight line to just above the first 



anal ray. D. n; A. 14 to 17; scales 5-33 or 34-4 bilineata sp. nov. 



i. Hasemania maxillaris sp. nov. 

 Plate I, fig. 1. 

 Type unique. 29 mm. C. M. No. 2937. Porto Uniao, Rio Iguassii. 

 Head 3; depth 3; D. 11 ; A. 19; scales 7-32-5 or 6. Eye 3 in the 

 head; interorbital less than the eye, about 4 in the head. Compressed, 



1 Contributions from the Zoological Laboratory of Indiana LTniversity, under 

 the direction of C. H. Eigenmann. No. 115. 



2 For Mr. John D. Haseman, who collected all of the specimens of this genus 

 thus far known. 



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