SOUTH AMERICAN NEMATOGNATHI. 361 



Habitat: Rio Plata to Guiana and Peru; Atlantic and 

 Pacific slopes of Panama. 



Species of this genus which at present cannot be 

 classified are: 



301.1. Loricaria platyura Muller & Troschel, in 

 Schomburgk Reisen in Brit. Guiana iii, 631, 1848 (Ru- 

 pununi). Upper plates of tail truncate behind; lateral 

 keels approximated on the 13th scute; eye 1J in interor- 

 bital, back with six broad black crossbars; one or more 

 bars on the fins. Lat. 1. 29. 



301.2. Hemiloricaria caracasensis Bleeker, Nederl. 

 Tijdschr. Dierkunde, i, 81, 1863 (Caracas). Lip scarcely 

 fringed, the posterior broad, the anterior narrow. Teeth 

 present. Lower surface with scutes. 



301.3. Loricaria bransfordi Gill, Proc. Phil. Acad. Nat. 

 Sci. 338, 1876 (Panama). 



301.4. Loricaria cadeca Hensel, Wiegm. Arch, i, 369, 

 1868 (Rio Cadea). 



According to the description, this species would be 

 identical with L. konopickyi Steindachner. As the lo- 

 calities are so greatly different we have placed it among 

 the doubtful forms. 



ANALYSIS OF THE SPECIES OF LORICARIA. 



a. Snout long and narrow, much as in Acestra or Hemiodontichthys; its 

 lower surface granular. 



b. Margin of the head in both sexes granular; teeth minute, or wanting 

 in one or both jaws; lateral keels becoming parallel, not coalescing; 

 no keels on head or on predorsal scutes. 



c. Teeth in the lower jaw only. (HEMIODON.) 



d. Lower surface of head with numerous small plates; eye one in 

 iiiterorbital; orbit with a notch; belly with irregular plates; up- 

 permost caudal ray produced. Head 3i!r-3J; Lat. 1. 27. (Kner.) 



depressa 302. 



cc. Teeth minute, numerous in both jaws; lower surface of the head 

 partly naked; eye If in iiiterorbital; orbit without a notch; anterior 

 profile concave; belly with 5 series of plates, uppermost and lower- 

 most caudal rays greatly produced. Head 4|; Lat. 1. 33. 



panamensis 303. 



