ZOOLOGICAl^ LTTEllATURE. 
Silurus punctattiSj sp, n.. Day, Proc. Zool. Soc, 1868, p, 155, from the 
Wynaad. 
Eutropius depressirostris figured by Peters, Mossamb. Flussfische, taf. 4. 
\ %. 6 , 
V Amiurus meridionalis figured by Glintlier, Trans. Zool. Soc. vi. p. 478, 
pi. 81. fig. 1. 
Noturm. Mr. Cope has referred specimens in the collection of the Phila- 
delphia Academy to three species, which ho shortly characterizes, Journ. 
Ac. Nat. Sc. Philad. 1868, vi. p. 237. 
Pimelodus managuensisj sp. n., Gunther, 1. c. p. 474, from the Lake of 
Managua. The same author names the P. cinerascens (Emer, not Gthr.) P. 
ioagneri,\\>\^ 
Vj Arius assimilis described by Gunther and compared with Hexanema^ 
tichthys hymenon'hinus (Blkr.), 1 . c. p. 476. 
Arius granulatus, sp. n., Peters, Monatsber. Ak. Wiss. Berlin, 1868, p. 464, 
Lagos. . 
" JElurichthys nuchalis figured by GUnther, 1. c. pi. 81. fig. 2. 
Doras .helicopJiilus^ sp. n., Gunther, Proc. Zool. Soc. 1868, p. 229, Surinam. 
Oxydoras acipenserinuSf sp. n., GUnther, 1. c. p. 230, pi. 20, Upper Ama- 
zons. 
Chiloglanis, g. n., Peters, I c. p. 699, Distinguished from Synodontis in 
having dilated lips, the upper being provided with teeth. — CA. deckemi, 
Sp. n., I c., with figure, from East Africa. 
Synodontis zanziharicus is described as a new species by Peters, 1. c. p. 600. 
Synodojitis nehidosus and zamhesensis are described and figured by Peters, 
Mossamb. Flussfische, pp. 28 & 81, taf. 6. figs. 1 & 2-8. 
Malapterurus. Prof, Peters has come to the conclusion that there is one 
species only in the rivers of Africa. Mossamb. Flussfische, p. 41 ; and Mo- 
natsber. Ak. Wiss. Berl. 1868, pp. 121-124. 
Callichthys at'matus, sp. n., Gunther, I, c. p. 230, fig. 1, Upper Amazons. — 
Callichthys arcifer, from Bio J aneiro, andV C. hemijjhr actus j fron Costa da 
Serra, spp. nn., Hensel, Wiegm. Arch. 1868, pp. 873, 374. 
Flecostomus barbatus. Dr. GUnther observes that the long bristles on the 
margin of the snout and the interoperculum are a sexual character peculiar 
to the male. Proc, Zool. Soc. 1868, p. 232. 
Chcetosto?nus. Dr. GUnther (Proc. Zool. Soc. 1868) has describ^ the fol- 
lowing new species : — Ch.fordii, p. 231, pi. 21 ; Ch. dep?'essics and Ch. mega-^ 
cephalus, p. 232, from Surinam ; Chcutostovius denteXy p. 233, from the Upper 
V Amazons.-^-C'Aie^os^om«s aspidolepisj sp. n., GUnther, Trans. Zool. Soc. vi. 
p. 477, Veragua. 
Chcetostmnus hystrix (Vandolli) is described and figured by M. Capello in 
Jorn, Sc. math. phys. e nat. Lisboa, 1868, v. p. , pi. 7. 
Acanthi<nis hystrix has no adipose fin, Giinther, Proc, Zool. Soc, 1868, 
p. 234. 
Hypoptopoma (g. n. Hypostomat,), GUnther, Proc. Zool. Soc. 1868, p. 234. 
This genus differs from Flecostomus in the peculiar formation of the head, 
which is depressed, spatulate, the eyes being on the lateral edge of the head. 
The moveable gill-covers are reduced to two bones, viz. the operculum, 
small and placed as in Flecostomus, and a second, larger bone (interoper- 
culum ?), separated from the eye by the narrow suborbital ring, and placed 
