EIGEXMAXX : NEW FISHES FRuM WESTERN COLOMBIA 



11 



Astyanax metae Eioenmann, ^|). no\'. 



5457 C. M. Tyiie 130 nun. 545s C. M.. 13153 I. U. M. Paratypes, 0, 103-130 

 mm. Rio Xegro. Villavieeru io. Manuel Gonzales. 



Head 4^ : depth about 2.5: I). 11: A. 29. 31. 25. 29. 28. 30. 30 in seveu 

 specimens. Sral; > s-_iii,(;; <:iAO-Q. 9-41-6. S-4ij-0. >-4n-7 in live specimens. 

 Eye 1 in snout. 3.5-3.7 in liead. 1.3-1.5 in inteiMjrbiral : depth of caudal 

 peduncle 2 in head. 



Compressed. ]'ather heavy forward; pre^"entral area rounded, with 

 small scales and without distinct median s,:^ries: prednrsal area bluntly 

 keeled, with a median series r.f 10 nv 11 scales: cc^.-ipital process extending 

 about one-fourth of the distance m the dorsal. l:)Oidered by four scales on 

 each side ; skull convex, parietal fontanel about twice as long as the 

 frontal : second suborbital couvex. leaving a naked area of equal width 

 ab'>ut its entire border, except below the angle in front where the naked 

 space is a little wider : premaxillary with four teeth in the outer series, 

 four or five in the inner, when five the lateral one minute : maxillary with 

 a single tooth : maxillary a trifle longer than the eye : each ramus of the 

 mandible with four large leeth and a few similar minute ones on the side : 

 gill-rakers slender, about a tliird as long as eye: 14 on the lower arch. 



Origin of dorsal fully an orbital diameter nearer the snout than the 

 caudal : highest ray of dorsal equal to the length uf the head or a little 

 shorter : adiin ;se nn well developed : caudal lobes longer than the head ; 

 origin of anal under base of last dorsal ray : ventrals barely reaching anal, 

 their raau-in >liu-lirly in advance of the vertica. from the first dorsal ray: 

 pectorals rea<:-hiiiL: .-tt least to rhe origin of the ventrals. 



Lateral line bu.t slightly decurved : soal-es regularly imbricate except 

 over the anal muscles and here the irregularity is slight : a sheath of a 

 single row of scales along the anal: base of caudal similarly sheathed: a 

 large axillary scale. 



Faint traces of lines following the scales ; no humeral spot : a large 

 dark band extending- frran the tips of the middle ray and the three rays 

 above the middle of the caudal tn their l>ase. expanding on the caudal 

 lieduiMde and driwrnvard and forward, fading out above the origin of the 

 anal. 



Closely allied to ntaxiinus, differing from all other species in the 

 obliqu.e band on the tail. 



Astyanax heterurus Eigenmann and Vv'ilson. sp. nov. 



5392 C. M. Type about 50 mm. 130S5 I. U. M.. Paratype about 46 mm. 

 Turando. Charles AYilson.- 



Head 3.25: dei^th 3.25; eye 2.75 in the head, about equal to the 

 interorbital. 



Oiigln of dorsal equidistant from tip of snout and base of middle 

 caudal ravs: p^'Ctorals abi ut equal to head withrmt opercle. reaching past 

 origin of ventrals; ventral^ siia-htly beyend . rigiual of anal: anal falcate, 

 its highest ray reaching to the last f^jurth ur fifth of the base of the fin. 



A vertically elongate humeral spot : a small round spot on the end of 

 the caudal peduncle: color of caudal uniqtie for the genus. Middle caudal 



