PISCES. 
175 
T, mxGi'ostoma (p. 323) ; T. microphthalmm (p. 324) ; T. panamensis (p. 324) ; 
T. hrevimanus (p. 325) ; T. petenensis (p. 326) j T. humilis (p. 327) ; T. oligo- 
lepis (p. 327) ; T. chrysargyreus (p. 328} ; T. ajffinis (p. 329) ; T. caudomacu- 
latus and T. polyodon (p. 330). 
20. Scissox' (g.n.) : Sc. macx'ocephakfs, sp, n., probably from Surinam (p.331). 
21. Psexidochalcetis (Kner) -with 1 species. 
22. Chirodon (Girard) with 2 species. 
23. Chalceus (Cuv.) with 1 species. 
24. Brycon (M. & Tr.) with 14 species, four of which are new : B. nat- 
tereri and B. hahimsis (p. 334) ; B. orthotamia and B. hrevicauda (p. 335). 
25. Cholcmopsis (Kner) with 4 species. 
26. Bryconops (Kner) with 2 species. 
27. Creagrutm (g. n.) ; type, Leporinus miilleri (Gthr.). 
28. Chakimts (0. & V.) with 4 species, Ch. elongatm being new (p. 342). 
29. Gastx'opelecus (Gronov.) with 3 species, G. strigatm being new (p. 343). 
30. Pidbuca (M. & Tr.) with 2 species, P. spilurus being new (p. 344). 
31. Agoniaies (M. Tr.) with 1 species. 
Sixth group : HyDbocyonina. 
32. Anacyrtm = Epicyrtus (M. & Tr.) with 8 Species, two of which 
are new : A. pauciradiatns (p. 346) and A. guatemalensis (p. 347). 
33. Hystricodan (Gthr.) with 1 species {Exodon paradoxus, M. & Tr.). 
34. Salminm (M. & Tr.) with 3 species. 
36. Hydrocyon (M. & Tr.) with 3 species, H. brevis from the Nile being 
new (p. 361). 
36. Sarcodaces (g. n.) ; type Salmo odoe (Bl.). 
37. Oligosat'cus (g. n.) : O. argenteus, sp. n., from Brazil (p. 353). 
38. Xipliox'hamphus (M. & Tr.) with 7 species. 
39. Xiphostoma (Spix) with 6 species. 
40. Cynodon (Spix) with 3 species. 
Seventh group : Distichodontina. 
41. Eistichodus (M. & Tr.) with 7 species, four of which are new : D. ros- 
tratus (p. 360), E. engycephalus (p. 361), and E. brevipinnis (p. 361) from the 
Nile ; E. macrolepis from the river Shir^ (p. 362). 
Eighth group : Ichthyborina. 
42. IcJithyborus (g. n.) : the two species known are Charachms besse (Jo- 
annis) and I. microlepis, sp. n. (p. 363), both from the Nile ; the latter species 
has been meanwhile described by Prof. Kner under the name of Psalidostoma 
caudimaculatum (Sitzgsber. Acad. Wiss. Wien, 1864, 60. p. 39, with a plate). 
Eighth (bis) group: Phagonina*. 
42 bis. Phago (g. n.) : P/i. loricaftes, sp. n., from Old Calabar. 
* In introducing this form here, we anticipate the Record of next year, as 
it has been described in Ann. & Mag. Nat. Hist. 1865, March, pi. 6 ; but we 
thinlf it useful to mention it in the place which it will take in the system. 
This group may be characterized thus : 
Phagonina. Characinoids with an adipose fin, with a short dorsal, with 
the gill-membranes attached to the isthmus, with the belly rounded, and 
with both jaws very moveable, their lateral halves being united into one 
piece. 
