SOUTH AMERICAN FlSliES 



89 



5. Pseudocorynopoma heterandria Eigonrnaiin, sp. nov. 

 5222 C. M. Type J. 80 mm. 5223 parntypes ,'5 luali's;, lai'.ircst IH) mm, 7 



females, largest 02 mm. Xiririca. Dee. 8, 1908. Haseman. 



Head 4.73; depth 2.0(:;-2.0 ; 1). lU: A. in males 2+8 or 0+2!)-84, total 

 40-44, sometimes 37 in females; scales 7-41 to 44-(); eyes 0.8-1 in snout, 

 3-3.66 in the head. 1.2.J-1.33 in the intercrbital ; depth of caudal peduncle 

 equal to its len.jjth. 



Oomprt'^siMl. elon.ii-ate ; dorsal profile arched very little; ventral ])ro- 

 file grreally arched from chin to end of anal; ventral surface compressed, 

 knife-like, the scales not lajjpin.ir over the mid-ventral line except in front 

 of pectoral ; predorsal area rounded, with a medial series of about 13 

 scales in front of the dorsal and about 0 irregularly placed scales in front 

 of them. Occipital process very short, about 1/13 of the distance from its 

 base to the dorsal ; skull convex, frontal fontanel narrow and short, shal- 

 low longitudinal groo^'es over the eye ; second suborbital covering the 

 entire cheek ; mouth large, very oblique : maxillary-premaxillary border 

 about 2.5 in the head : prernaxillary vrith an outer series of usually 3, 

 rarely 4, teeth and an inner series of 7 ; maxillary with 2 or 3 teeth ; 

 mandible with seven graduate teeth, the second below normal, the fifth to 

 seventh decreasing very rapidly; several minute teeth on the sides. 



Origin of dorsal mudi nearer base of caudal than to upper angle of the 

 gill-opening ; dorsal rounded, the seventh ray highest, reaching tip of 

 adipose in the male, not to adipose in the female; adipose fin small; 

 caudal divided to its base in the male: origin of anal in advance of the 

 origin of the dorsal, emargiuate in the female, falcate in the male, the rays 

 forming the lobe (3-9th) with retrorse hooks; veutrals reaching to the 

 anal in the male, much shorter in the female; pectorals to near anal in 

 both sexes. 



Lateral line complete, moderately decurved, axillary scales small : 

 caudal naked except for a few scales at the base of the lower lobe, the 

 skin at the base of the fin tumid, a large space arched over by united scales 

 at the base of the lower rays just below the middle, the opening bordered 

 by a leaf-like scale abo^'e and a twisted scale below and behind : scales reg- 

 ularly arranged except o^-er and a little in front of the anal, the rows 

 deflected and continued to form a loose sheath at the base of the anal. 



A black spot on base of middle caudal rays ; streak in front of anus in 

 male black ; lower lip dark : no other markings. 



6. PseudocorjTiopoma doriaB Perugia. 

 Fseudoconjnopoma dorm Perngia, Ann. ^Eus. Oenova, ser. 2. X, 1891. p. 

 616, fig. 



Bcrgki aJtipiniiis Steindachner. Anz. Ak. Wien. 1891, p. 173. 

 ChalclnopeJccuj arf/cittiinis Holmberg. iievista Argentina. 1891. p. 190. 

 Habitat : La Plata basin. Rio Grande do Sul. 



5219 C. M. 7. largest a female, 75 mm. long. Uruguayana. Feb. 5. 1909. 

 Haseman. 



5220 C. M. 7. males, the largest 63 mm. 12 females, the largest 71 mm. 

 Cace<^iuy. Jan. 31, 1909. Haseman. 



