1878.] 699 
[Cope, 
vian portion of its course. This list is obviously only provisional, as explo- 
ration of the Amazonian basin has not progressed sufficiently to enable us 
to assert the restricted distribution of any type. Thus the genus Otocin- 
clus Cope, first obtained from the Peruvian Amazon, has been ascertained 
by Steindachner to occur near Rio Janeiro. Zathorax and Triportheus first 
determined from western species, occur on the Lower Amazon. The genera 
remaining are : ; 
Ill. Siluride ; Brochis Cope; Chenothorax Cope; Physopyxis Cope ; 
Agamyxis Cope ; Pariolius Cope. 
Characinide ; Aphyocharux Gthr.; Iguanodectes Cope; Stethaprion Cope. 
Finally, the species which have not yet been found below the Peruvian 
boundaries are as follows.: I include species previously described by myself 
from Pebas, in the essay on The Fishes of the Ambyiacu River,* also 
those described by Gill from Orton’s first collection, and by Giinther from 
those of Bartlett, 
EV SUULUIT CB =<. oc. sco, 3 meter #4 Vanaewrius Gthr... 2. ..-- 26 5 
Psendorhamdtay Biikysye scape -- i) xiphorhamphus MoT. 2. tase 
Rimrelodus ae: (so cesagee see Ale vOrolyeny Mie T. ..2 5.0. sos kas oe 1 
IBUAMeMNUS WTS Ws. ccye otse os ois 1 Xiphostoma DURE crac, Se svereieeres 1 
Hpapterus Copesacsns see 6 <sta 1 iiCharacmdium Remihdiee. ss. cece 2 
Ancheniptertis, Cl Viens. clclee = o PAP hy Ochanaxa Gills see reser me 
Centromochlus Kner: ~...2./.... 1) Schizodon Agass.............. i: 
MOraAsHaG series vet eee cee ere a opiouanodectes!Cope =. se sc. 4s 1 
ANOKA: OPCs s's te <1 cte lees chore 2 2 | Odontostilbe Cope............ ft 
IN SAMI SISK COME ce crarios <i le shee il IbeyoO AIS EER Guaoooeboce 3 
IPhysopyxisiCopers.. 6c. .csecec 1) Ehemisramimius Galles tsi. 2eeistete 1 
Dianema Cope..... aiaieets) Sere 104 plea aCeONaT NL eA Li eeoe wale amie Go 4 
IBEOCHISIC OPES. oe a cove << @ oe crore 2| Tettagonopterus Cuv.......... 6 
Cheenothorax Cope-<-.......-- 2 | “Eriportheus’ Copes. ..-.-.- =e 1 
Gastrodermus Cope............ 5 | Stethaprion Cope......-...+--.< 2 
Hypoptopoma Gthr............ 2 @lraleeus  Cuivic-raayeisiers relies 1 
OfocimelusiCopercc. acess ci + ot Le Serrasalmo) Wace pres «te areictere cst 2 
Liposareus Gthr.~... 2.2... oe (ren Web yuunis: COME: 2. «iiss umrejsieteie i 
Plecostoutud Arta tos 5 sicqssv i « At NEM LELCR MOUEV.. scenercrelvix Uaydie ames 3 
Chaetostomus PCs 605.0 00 .)< 5) 0 Oy Eager tabi C5 V eicreyeratatsyaelarn pis 1 
Pariolius)Gopes-aae- oases es. Li Holotaxis Cope: 5... sr. SOND al ae 
EU IGHOMUyCSLUS ee meester ee 2 (OURO OCU Es oo Sano bs Dou Oot 10 
ASPTEGATIED. <6 catlee css 5's! EAMG BUN Ua LGC Kearse ayetetasticdese/s. = vets a) 37a 6 
Bunocephalus Kner... ..)5. <=: 2) GeopHarus Heck... 6s. «ees 1 
Dysichthya Cope. si. a) ooueseas 1 | Crearctehla Hed, 2/5... 5 sf. o 
Characinide..... dhe soe ithe ates 53 
ATOMS YS DUK aictetehorevereie’s aetcrei oye ath 
Cui aio Cuivre. tele eres ee 5 Total number of species not yet 
Prochilodus Agass......... ace Oh | known below the Peruvian 
Roshoigdey Guat ch cans cee cos SHAE ANTUNEZ (OTe vetetsroralcia’s leieteisholereteinee 120 
* Proceed. Philada, Academy, 1872. 
