398 



PATAGONIAN EXPEDITIONS: ZOOLOGY. 



Family H VPOPHTHALMIDyE 

 Helogenes Giinther.' 



Type : Helogenes niarmoratus Giinther. 

 Range that of the single species. 

 Helogenes niarviorafus Giinther, 



E. & E.. 3<3. 

 Habitat : Esscquibo. 



HvroriiTHALMUS Spix. 

 Type: Hypoplitlialmiis edentatus Spix. 



Notofyhthalniits Hyrtl; Pseudohypoph- 



tlialmus Bleeker. 

 \i. Hypop/if/mhnus edentatus Spix, 



E. & E., 313- 

 Hypophthalinus viarginatus, longifilis 



and spixii Cuvier & Valenciennes; 



H. edentulus Castelnau ; H. fivibri- 



atus Kner ; H. perporosus Cope. 

 Habitat : Amazons and tributaries, and 



northward. 



Family PYGIDIID^ 

 Subfamily Cetopsin.^ 

 Hemicetopsis Agassiz. 



Ty])e : Silurus candint Spix. 

 Range : A narrow area from Para to 

 Ecuador. 

 Al. Heinieetopsis candiru (Spix), 



E. & E., 319. 

 Habitat: Rio Cupai to Rio Huallaga. 

 A2. Hemicetopsis plumbeus Steindachner, 

 E. & E., 320. 

 Habitat: Canelos. 



PsEUDOCETOPSis Bleaker. 



Cetopsis Agassiz. 



Type : Silurus caecutiens Lichtenstein. 

 Range that of the single species. 

 Cetopsis coccutiens (Lichtenstein), 



E. & E., 320. 

 Habitat: Amazon from Gurupa to Rio 

 Cupai ; Orinoco; Irisanga. 



Type : Cetopsis gobioides Kner. 

 Range: Irisanga, Maraiion. 

 . Pseudocetopsis gobioides (Kner), 



E. & E., 322. 

 Habitat: Irisanga. 

 \2. Pseudocetopsis ventrnlis (Gill), 



E. & E., 322. 

 Habitat: Maranoii. 

 \t,. Pseudocetopsis inacrotero)ienia (Boul- 



enger), Boulenger, 1898, 8. 



Habitat : Rio Zamora, eastern Ecuador. 



Cetopsogiton Eigenmann & Bean. 

 Type : Cetopsis oecideutalis Steindach- 

 ner. 

 Cetopsogiton occidentalis (Steindach- 

 ner) H. & E., 322. 



Habitat: Guayaquil. 



Subfamilv Pvgidiin^. 



Nematogenys Girard. 



Type : Trichomycterus incruiis Guiche- 



not. 

 Range that of the single species. 

 Nematogenys inermis (Guichenot), 



E. & E.. 323. 

 Nematogenys nigricans and pallidus 

 Philippi. 



' This genus is a member of a new family. 



Habitat : Central Chili. 



Pariolius Cope. 

 Ty])e : Pariolius armillatns Cope. 

 Range that of the single species. 

 A I. Pariolius armillatus Cope, 



E. &• E., 324. 

 Habitat: Ambyiacu. 



