36 CALIFORNIA ACADEMY OF SCIENCES. 



13. Loricaria magdalenee steiudacbuer. 



14. Loricaria filamentosa Steindachner. 



? L. brans/ordl Gill. 



§ Loricaria. 



15. Loricaria variegata Steindachner. 



16. Loricaria macrodon steindachner. 



17. Loricaria nudiventris Cuv. & Val. 



18. Loricaria cataphracta Liunoaus. 



L. duralj\n\idd\\^; L. cirrhosa)Moc\\', L. se^«yer«Lacepede; L.carinata 



Castelnau; Plecostormis flagellaris Gronow. 

 Localities: Vigia; Sao GouQallo; Cameta; Mauaos; Para; Eio Negro; 



Coary; Villa Bella; Gurnpa; Eio Preto; Tajapiiru; Porto do Moz; 



Teffe; Maranon; Ucayale; Obidos. 



19. Loricaria lata sp. uov. 



Types, No. 8123; eleven specimens; .11-. 27 m. to base of caudal; Goy- 

 az. Senbor Honorio. 



Body everywhere greatly depressed, the depth about If 

 in the width; the width at origin of anal equals snout and 

 orbit in the adult, equal to the snout alone in young. Head 

 depressed, its depth considerably less than length of snout, 

 its width little longer than its length to upper angle of gill 

 opening. Posterior half of occipital with two inconspicu- 

 ous keels. Humeral plate without keels. 



A shallow, rounded orbital notch; interorbital very 

 slightly concave. E3^e 3f-4J in snout, 7-8 J in head, IJ- 1.^ 

 in the interorbital. Snout pointed, its margin entirely 

 granular. Lips margined with cirri, the lower lip emargin- 

 ate, its surface also covered with cirri. Teeth few, large, 

 those of the upper jaw longer. 



Nuchal plates faintly bicarinate: lateral keels rather 

 prominent, approximated on the 20th scute; breast and 

 belly with numerouss mall plates, or almost \\ hollj^ naked 

 in specimens .10 m. long to base of caudal. 



Distance of dorsal lin from tip of snout 3 in the length. 



Caudal fin injured. Anal fin as higli as the ventrals. 



