SOUTH AMERICAN NEMATOGNATHI. 409 



353. Flecostomus biseriatus. 



Plecosiomus biseriatiis Cope, Proc. Acad. Nat. Sci. Philad. 285, pi. 16, 



1871 (Amazon). 

 Habitat: Amazon. 



354. Flecostomus seminudus. 



Plecostomus seminudus Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. 



i, 169, 1888 (? Brazil). 

 Habitat: Brazil. 



355. Plecostomus annae. 



Plecostomus aniiai Steindacliuer, Flussfische Siidamerika's ii, 112, pi. 



iii, fig. 2, 1881 (Para). 

 Habitat: Para. 



356. Flecostomus pantherinus. 



Hypostomris pantherinus Kuer, Hypostomiden, 267, 1853 (Eio Gna- 



pore). 

 Plecostojnvs 2^antheri7ius Gtiuther, Cat. Fish. Brit. Mus. v, 2.31, 1864 



(copied). 

 Habitat: Eio Gnapore. • 



357. Plecostomus cordovae. 



Plecostomus cordovee Gtlnther, Ann. Nat. Hist. (5) vi, 11, 1880 (Cor- 

 dova). 

 Habitat: Central portion of the Argentine EeiJiiblic. 



This species is known only from the types in the 

 British Museum. 



358. Plecostomus lima. 



Plecostomus lima (Eeiuhardl MS.) Ltitken, Overs. Dan.Selsk. 1873, 

 No. 3, 70 (Eio das Velhas); id. Velhas Flodens Fiske 141, 1875 

 (Eio das Velhas). 



Habitat: Eio San Francisco and its tributaries; Eio Grande do Sul. 



We have examined 5 specimens of this species .16-. 40 

 m. Rio San Francisco; Rio das Velhas and Rio Grande 

 do Sul. 



Body short and heavy, its depth 1| in its width. Head 

 somewhat longer than broad, its upper surface tlattish. 

 None of the plates keeled; posthumeral ridge prominent 

 on the anterior 5 scutes. Tail stout, compressed, flat on 

 upper and lower surfaces. Breast and belly, except a 

 narrow area around the ventrals, covered with large 

 scutes. 



