366 CALIFORNIA ACADEMY OF SCIENCES. 



nuchal plates. Shields and scutes hispid; a large naked 

 area about the mouth. 



Orbit without a notch, 4 in the snout, 7 in the head, 

 1 in the interorbital. 



Teeth fine, numerous in both jaws. 



Five series of plates on the belly; anal plate as long 

 as broad; lateral keels remaining distinct to the caudal 

 fin, approximated at about the 16th lateral scute. 



Distance of dorsal fin from end of snout 3f in the 

 length; first dorsal ray very high, little less than its dis- 

 tance from tip of snout. 



Caudal forked, the outermost rays greatly produced, 

 the upper filament about equal to the length from tip of 

 snout to its base, the lower somewhat shorter. First anal 

 ray little less than length of head. Ventral fins reach- 

 ing to the end of the base of the anal fin; pectorals to 

 the vent. 



Brownish; dorsal fin dark brown on its first and sec- 

 ond membranes and second ray, its other rays spotted; 

 base of caudal fin and a longitudinal stripe on each lobe 

 dark brown; other fins plain; a large blackish area in 

 front of each eye. 



Head 4J; D. 8; A. 6; V. I, 5; P. I. 6; Lat. 1. 33. 



304, Loricaria rostrata. 



Loricaria rostrata Spix, Gen. et Spec. Pise. 5, plate iii, fig. 1-2, 



1829 (Kivers of Brazil); Cuv. & Val. xv, 478, 1840 (copied); 



Kner, Panzerwelse, 83, 1853 (Kio Braiico); Giinther, v, 256, 



1864 (copied); id. Proc. Zool. Soc. Lond. 1868, 235 (Xeberos); 



Peters, MB. Ak. Berl. 1877, 471 (Calabozo); Cope, Proc. Am. 



Philos. Soc. xvii, 681, 1878 (Peruvian Amazon); Steindachner, 



Flussfische Siidam. i, 17, 1879 (Mamoui River); Vaillant, Bull. 



Soc. Philom. Series 7, iv, 156 (Calderon); Eigenm. & Eigenm. 



Proc. Cal. Acad. 2d Ser. ii, 35, 1889 (Manacapuru). 

 Loricaria acuta Cuv. & Val. xv, pi. 452, 1840 (not described). 

 Loricaria barbata Kner, Panzerwelse, 87, pi. v, 1853 (Cujaba 



Fluss.); Giinther, v, 257, 1864 (copied). 

 Habitat: Upper course of the Paraguay; Solimoens; Marafion and 



tributaries westward; Panama; Calabozo. 



