94 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



Family ATHERINID^. 



ODONTESTHES Evernnann and Kendall, new genus. 



Odontt'sthes Evermanu and Kendall, new g-enus of Atherinidffi {O. 

 2)erugise). 



This genus differs from BaslUchthys in having 2 rows of compara- 

 tively long, sharp teeth on each jaw, and conspicuous vomerine teeth, 

 instead of several series of fine sharp jaw teeth and no teeth on the 

 vomer as in the latter genus. 



{odov?:^ tooth and iffdloo^ eat.) 



34. ODONTESTHES PERUGI^E Evermann and Kendall, new species. 



Atherinichihys vomerinaf, Perugia, Ann. Mus. Civ. Stor. Nat. Genova, 2d ser., X 



(XXX), 1890-91, p. 621 (Montevideo). 

 Atherinichthi)s vomerina, Berg, Anal. Mus. Nac. Buenos Aires, IV (2d ser., 1,) 



1895, p. 26 (Costa Patagonica; Mar del Plata, Montevideo); not Atherina 



vomerina CvviER and Valenciennes. 



Head 4.17 in length without caudal; depth 7.31; e^^e ii.M in head, 

 1.08 in interorbital; snout 3.11; D. IV-S; A. 11; scales 50-10. 



Body comparative!}' slender, somewhat compressed, belly rounded; 

 head flat above, scaleless; snout long, depressed, lower jaw slightly 



Fig. 3. — Odontesthes perxjgi;e. (From the type.) 



shorter than the upper, with comparatively long, sharp, somewhat hook- 

 ed teeth, in 2 rows in each jaw; somewhat smallar but similar teeth on 

 head of vomer arranged in 3 groups, connected by a single row of still 

 smaller, similar teeth; no teeth on palatines; eye moderate; scales 

 entire; pectoral moderately long, 1.27 in head; posterior portion of 

 first dorsal about over anterior portion of anal; second dorsal inserted 

 posterior to middle of anal. 



Color (after preservation in formalin and later in alcohol), generally 

 pale yellowish gray; a silvery stripe below spinous dorsal occupying 

 lower part of fourth, whole of iifth and upper part of sixth scale of 

 the tranverse series; margin and tip of snout black; few black dots on 

 back, thickest on margins of scales posterior to dorsal; bases of 

 posterior .5 dorsal rays duskj^; extremity of caudal broadly dusky, 

 other fins pale. 



One specimen, the type. Cat. No. 55572, U.S.N.M., 5.62 inches 

 long, Argentina; locality label lost; probably from fresh water. 



