82 



THE AMERICAN CHARACIDAE. 



10. Moenkhausia sanctae filomenae (Steindachner) . 

 Plate 16, fig. 1, 2. 



Telragonopterus agassizii Boulenger (non Steindachner), Bull. Mus. univ. Torino, 1895, 10, no. 196, 



p. 3 (Colonia Risso) ; Trans. Zool. soe. London, 1896, 14, p. 35 (Descalvados and Monte Sociedad) ; 



Boll. Mus. univ. Torino, 1897, 12, no. 279, p. 4 (San Lorenzo); 1900, 15, no. 370, p. 2 (Urueum). 

 Poecilurichlhys agassizii Eigenmann, Proc. Acad. nat. sci., Phil., 1903, p. 522 (Arroyo Trementina; 



Arroyo Chagalalina). 

 Moenkhausia agassizii Eigenmann, Ann. Carnegie mus., 1907, 4, p. 138, pi. 12, fig. 2 (Corumba). 

 Tetragonoplerus sanctae filomenae Steindachner, Anz. K. akad. wiss. Wien, 1907, p. 82 (Sancta Filomena, 



Parnahyba). 1 

 Moenkhausia australe Eigenmann, Bull. M. C. Z., 1908, 62, p. 102. 



Habitat. — Paraguay Basin, Rio Parnahyba, and southern Madeira. 



Specimens examined. 



1 The following is an abstract of Steindachner's description of the types: — 



Head 3.6-3.5; depth 2.25-2.2. A. 25-27; scales 4.5-22 to 24-3.5; eye nearly 3 in head; inter- 

 orbital 2.33-2. 



Interorbital slightly convex; snout equals eye; maxillary not reaching center of eye; mandibular 

 teeth brown, darkest at tip; two small teeth on maxillary. 



Origin of dorsal equidistant from caudal and front of eye; ventral in front of vertical from dorsal; 

 pectoral reaching ventral, ventral not to anal. 



Lateral line frequently interrupted, skipping several scales in the posterior part of the body. 



Silvery dark above; scales margined with darker; humeral spot not sharply demarked, rounded 

 or oval; caudal spot deep, dark brown, very large, forming a crossband in base of caudal. 



