38 CALIFORNIA ACADEMY OF SCIENCES. 



Head long, pointed, the snout acute; depth of the head 

 1| in its width; occipital with scarcely evident keels; inter- 

 orbital convex; anterior profile concave; tip of snout naked. 

 A narrow orbital notch. Eye 3| in snout, 7 in head, 1| in 

 the interorbital. 



Lower surface of the head naked; teeth numerous and 

 well developed in both jaws; thoracic plates small, the an- 

 terior margin of the mailed ventral region truncate, in a 

 line with tiie gill-openings. Five longitudinal series of 

 ventral plates; anal plate and the plates anterior to it as in 

 L. leffeana; nuchal plates obscurely bicarinate; lateral keels 

 becoming more or less entirely coalesced on the 15th 

 plate. 



Distance of dorsal fin from tip of snout 3J-3| in the 

 length; first dorsal ray higher than length of head; outer- 

 most caudal rays produced; anal fin higher than ventrals or 

 pectorals. 



Light brown with six broad cross-bands, the first on tlie 

 nape, the second under origin of dorsal fin; a dark band 

 forward from eye, a narrower one down from eye; head and 

 anterior half of body with black pores; dorsal slightly 

 dusk}^ obscurely spotted, its base with a few spots; base of 

 caudal and a band parallel to its margin dark brown; anal 

 and ventrals light; pectoral like the dorsal. 



Head4J-5; lat. 1. 29. 



32. Loricaria anus Valenciennes. 



Locality: Kio Grande do Sul. 



§ LoricariicJithys. 



33. Loricaria acuta Cuv. & Val. 



L. ca^tanea Castelnau; ? L. maculaia Giintber. 



Localities: Villa Bella; Lake Hyanuary; Cndajas; Mauaos, on the Eio 

 Negro; Xingu Cascade; Lago Alexu; Obidos; Coary; Teffe'. 



34. Loricaria maculata Bioch. 



L. amazonica Castelnau; PL caiaphracta Gronow. 



Localities: Coary; Santarem; Iga; Hyavary; Obidos; Teflte; Jutaby. 



