'%9l.^'] PROCEEDINGS OF THE NATIONAL MUSEUM. 29 



26. HEPTAPTERUS Blocker. 



83. H. mustelinus (Val.). Rio Grande do Sul ; Rio Plata. 



27. ACENTRONICHTHYS Eigeum. & Eigenra. 



84. A leptos Eigeum. & Eigeum. Sao Mateos. 



85. A. suriiiatneusis (Bleeker). Surinam. 



86. A. collettii (Steiud.). Rio Plata. 



28. NANNOGLANIS Bouleuger. 



87. N. fasciatiis Boulenger. Ecuador. 



29. PIMELODELLA Eigeum. it Eigeum. 



88. P. cristatus (Miiller & Tro.schel). Rivers north of Cape Sau Roque. 



Pimelodus uj.siy/its Scliomburgk, description, not plate; Pimdodus a<jasfiizn 

 Steiudacbner ; Fhnelodas opthalmicus Cope. 



89. P. wesselii (Steiud.). Rio Puty to Essequibo; Amazon. 



90. P. gracilis (Valenciennes). La Plata to Oriuoco. 



91. P. pectinifer Eigenm. & Eigeum. Pio Parabyba. 



92. P. modestus (Giiutber). Western Ecuador; eastern Panama. 



93. P. elongatus (Giinther). Western Ecuador. 



94. P. lateristriga (Miiller & Troscbel). North of Rio Parabyba. 



95. P. harttii (Steiud.). Rio Parabyba. 



96. P. buckleyi (Boulenger). Rio Parabyba ; Amazon; Marafiou. 



97. P. vittata (Kroyer). Atlantic slopes of Minas Geraes and Bahia. 



98. P. chagre-si (Steiud.). Rio Chagres. 



99. P. brasilieiisis (Steiud.) Rio Parabyba. 



30. PIMELODUS Lacdpede. 



Pseudariodes Bleeker ; Pucudorlxamdia Bleeker. 



100. P. cyanostigma (Cope). Pebas, Ecuador. 



101. P. qiiadrimaculatus (Bloch). ? America. 



102. P. eques Miiller &. Tro.schel. Amazon, Solimoens, and northward. 



103. P. ornatus Kner. Amazou, Solimoens, and northward. 

 Siluriis mc(/acephalus Natterer. 



104. P. albicans (Cuv. & Val.). Rio Plata. 

 ArinH albidits Val.; Arms moroli Val. 



105. P pictus Steind. Maranou. 



106. P. clarias (Bloch). Rio Plata to Rio Magdalena. 



Pivielodioi macidatiis Lacepede; Pimelodit.'^ rifjidus HiV]x ; Piinelodns blochii Cwv. 

 ct Val.; Pimelodus arekaima SchomhuTfrli (plate, not description); MysUis 

 ascita Gvono-w ; Pimelodus maoronema Bleeker; Pseudarioden albicans Liit- 

 ken; f Pseudariodes imntlierinus Liitken; Pseudorhamdia piscatrix Cope; 

 Piramutaua macrospila Giiutber. 



107. P. grcs-skopfii Steiud. Rio Magdalena and tributaries. 



108. P. labrosus Kroyer. La Plata. 



109. P. valenciennis Kroyer. Rio Plata. 



110. P. westermaiiui Reinhardt. Rio das Velbas. 



