yO PROrFJ'UUXGS OF TITE XATIOXAL MT'SEUM. vol. xxxi. 



orlntalU Cuvier und Valenciennes and P. hiUtw'ii Rcnnhardt do not 

 show. Berg gives the fin ra3^sand scale counts of P. na><\m as follows: 



D. 12; A. 1>; P. 15; scales 5-38 to 40-4 or 5. 



Kner gives them as D. 11; A. 9; P. 15; scales 1^(3 to 38-3^ to 1. 



Steindachner has described and figured a Pdrodon. affinls from La 

 Plata" of which he gives D. 12; A. 8; P. 12; scales 5 to 5^-44 to 15-3^ 

 to 4, and which differs in other respects from description of figures 

 of P. nasus. In his account of this species he expresses the opinion 

 that P. nasus Kner and P. liUldr'il Reinhardt are synon>^mous with 

 P. sahoi'hltalls Cuvier and Valenciennes. 



In specimens which Berg identifies with P. affinh he gives D. 11 or 

 12; A. 8; P. 12 or -13; scales 5^-42 to 47-4 (Rio de la Plata; Rio 

 Paraguay). 



Perugia'' lists Parodon nasns Kner from Tucuman and Cordoba, 

 regarding which he says ""Doctor Steindachner in descrilnng a new 

 species of Parodon., P. ajjinis (Denk. Ak. Wien, XLI, p. 20) expresses 

 the opinion that P. siiborMtalis, P. nasus., and P. Jiillarii Reinh. (Liit- 

 ken, Velhas — Floden Fische, p. 194, figs. 3, 4) are sj^nonyms. From the 

 comparison I am able to make of our specimens with the figure and 

 description of Cuvier and Valenciennes, Kner, and Liitken, I agree 

 exacth' with Steindachner's view." 



Parodon suborbital is Cuvier and Valenciennes'" has head less than 5; 

 depth 4; D. 11; A. 9; scales 37. 



The very limited material at our command prohibits our expressing 

 an}^ decided opinion regarding the value of one or the other of these 

 somewhat contradictory views, and we are, therefore, unable to identify 

 our 2 specimens with certaint}'. It is especially hard since the}" are 

 3^oung individuals not over 1.87 inches long; P. suhorhltalis was 5 inches 

 long; P. nasns Kner, over 4 inches; P. nasus Berg, 4.75 to 5^; P. 

 ajffnis, about 4. However, since our specimens agree so well with 

 Kner's description and Berg's account, we believe it safest to follow 

 Berg and record them as P. nasus Kner. 



We regard this as perhaps justifiable also from the fact that 

 J\ sxdjorhitalis is from a region widely remote from that of the pres- 

 ent species. The tj^pe of P. nasus was from Rio Cuyaba, in southwest 

 Brazil, a tril)utary of the Parana flowing into La Plata. Other speci- 

 n)ens of ^^'eyenbergh and Berg were from the provinces of Cordoba 

 and Salta, respectively. Ours were taken, perhaps in Rio Primero, 

 Cordoba, or perhaps in some of the tributary waters of the Rio Negro, 

 or possibl}' from La Plata. 



« Ueber einige neue und seltene Fish-Arten aus deni La Plata, Denks. Ak. Wiss. 

 Wien, XLI, 1879, p. 20, n. 1, pi. iii, fig. 3. 



''Ann. Mus. Civ. Stor. Nat. Geneva, 2d ser., X (XXX), 1890-91, p. dcxxxvii. 

 <Hist. Nat. Poiss., XXII, 1849, p. 51, pi. dcxxxvii, Maracaibo. 



