32 



NEW GENERA AND SPECIES OF FISHES. 

 By J. Douglas Ogilby, 



TACHISURIN^. 



CiNETODUS, gen.nov. 



Hjead somewhat depressed, wider than deep, the upper profile 

 Hnear and moderately oblique. Mouth small and crescentic, the 

 upper jaw slightly projecting; lips thin, without posterior lobe; 

 no preorbital cavity. Jaws with broad bands of small, conical, 

 acute teeth; palatines anteriorly with a patch of similar teeth 

 implanted upon a movable cushion ; no vomerine nor posterior 

 palatine patches. Barbels six, two maxillary and four mental, 

 the former of moderate length and slender. Eyes small and 

 lateral. Gill-openings restricted, narrower than the isthmus ; 

 gill-membranes partially united, broadly attached to the isthmus; 

 live branchiostegals ; gill-rakers short, stout, few in number. 

 Axillary pore present. Dorsal fin inserted above the interspace 

 between the pectorals and ventrals; adipose tin moderate, opposite 

 to the anal. Occiput rounded ; nuchal crest conspicuous. 

 Occipital fontanelle narrower and much shorter than the inter- 

 orbital; supraorbital fontanelle present ; otic fonticle small and 

 circular. 



Etymology: — kivtjtos, movable; oSdu?, tooth. 



Type: — Aritts froggatti, Ramsay & Ogilby. 



Distribution : — Rivers of southern New Guinea. 



Nedystoma, gen.nov. 



Head scarcely depressed, but little wider than deep, the nuchal 

 region not elevated. Mouth moderate and transverse, the upper 

 jaw slightly projecting; lips thin, without lobe. Jaws with two 

 series of feeble, somewhat deciduous teeth; vomer and palatines 

 toothless. Barbels six, two maxillary and four mental, all short 



