171 
EAPLOOHITONID^. 
Body naked or scaly. Margin of the npper 
jaw iurniod by the intermaxillary ; opereulaer ap- 
paratus complete. Barbels, none. Gill opening 
wide; pseudohranchise well developed. Air-bladder 
simple. Adipose fin present. Ovaries laminated ; 
the eggs fall into the cavity of the abdomen, 
there being no oviduct. Pyloric appendages, none. 
“ Presh water fish, from the temperate parts of 
South America and South Australia, representing 
the Salmonoids of the Northern Hemisphere.” 
PEOTOTEOCTES. 
Pormed by Dr. Grunther on a very remarkable fish found in 
several rivers of Victoria and of North Tasmania. 
PBOTOTSOCTES MAE^XA. 
Prototroctes marajna, Gunther, Catal., vol. v., p. 382. 
{Yarra Herring.) 
Having not yet seen this sort living, or in a fresh state, I only 
mention it here ; it exhales a very strong and particular smell. 
It used to be very common in the Yarra, but since the introduc- 
tion into that river of the Murray God, it seems to have been 
almost destroyed by it. No specimens, are to my knowledge, now 
found near Melbourne, and it has become very scarce even in 
the upper parts of the river. 
scopelida:. 
“ Body naked or scaly. Margin of the upper jaw 
formed by the intermaxillary only ; opercular ap- 
paratus sometimes incompletely developed. Barbels 
none. Gill-opening very wide ; pseudohranchiae 
