294 CHUOMIDES. 



14. Heros efasciatus. 

 Heckelf Brasil. Fluss-Fische, p. 372. 



D.l|. A.^. L.lat.30. 



The fold of the lower lip continuous in the middle ; scales on the 

 cheek in six series. Brownish-yellow, each scale darker at the hasc; 

 dorsal and caudal fins with series of dots, (ffeck.) 



Rio Negro. 



Perhaps only another variety of H. spurius. 



15. Heros friedrichsthalii. 

 Heckel, Brasil. Fluss-Fische, p. 381. 



D. gl^. A. g. L. lat. 31. L. transv. 4/12. 



The fold of the lower lip continuous in the middle ; scales on the 

 cheek in seven series. YeUowish-olive, with six or seven blackish 

 cross-bands; a black band from the eye to the upper part of the root 

 of the caudal, interrupted by the interspaces between the cross-bands; 

 the origin and end of this band are e^ged with yeUow ; suboperculum 

 with a black ocellus ; an oblique black streak from the eye towards 

 the ocellus. 



Central America. 



a-h. Fine specimens. Lake Peten (Guatemala). From the Collec- 

 tion of Messrs. Godman and Salvin. 



16. Heros salvini. 

 D. iZ. A. ^. L. lat. 29. L. transv. 5/10. 



Fold of the lower Up continuous in the middle ; scales of the cheek 

 in five series. Base of the soft dorsal scaly. 



Guatemala. 

 a-c. Fine specimens. Biver de Santa Isabel. From the CoUeetion 



of Messrs. Godman and Salvin. 

 d-e. Fine specimens. Lake Peten. From the Collection of Messrs. 

 Godman and Salvin. 



Description. — This species is closely allied to H. friedrichsthalii, 

 but appears to have larger and fewer scales on the cheek. It has a 

 peculiar physiogiiomy, like that species, in consequence of the con- 

 cave upper profile of the snout, which is turned upwards. The height 

 of the body is contained twice and a fourth in the total length (with- 

 out caudal), and the length of the head twice and three-fourths. 

 Head somewhat longer than high ; snout of moderate extent, longer 

 than the eye, pointed, with the cleft of the mouth very obKquc, and 

 with the lower jaw projecting ; the maxillary docs not quite extend 

 to the vertical from the anterior margin of the orbit; Praeorbital 

 narrower than the orbit. The width of the orbit is one-fourth of 

 the length of the head, and equal to that of the interorbital space. 



