tJ74 DESCRIPTIVE CATALOGUE OF AUSTRALIAN FISHES, 



Genus Narcine, Henle. 

 Tail distinct from and longer than the sub-circular disk, with 

 a fold on each side. Body entirely naked. Two dorsal fins on 

 the tail, without spine ; caudal fin well developed ; ventral fins 

 separate. Nasal valves confluent into a quadrangular valve. 

 Teeth almost flat, sometimes with a median point, which however 

 does not project. Spiracles immediately behind the eye. An 

 electric apparatus between the head and the pectoral fins. 



Tropical and Sub-tropical Seas. 



1112. Narctne tasmaniexsis, Eichards. 



Trans. Zool. Soc. III., p. 178, pi. 11, fig. 2.— Guntli., Cat. Fishes 



VIIL, p. 452. 



Outline of the disk elliptical. Spiracle close behind the eye, 

 without tubercles on the margin. The first dorsal fin not larger 

 than the second. Hind-margin of the caudal fin obliquely 

 rounded, passing into the lower margin. Colour brownish. 



Tasmania. Length up to six feet. 



Genus Hypnos, Dum. 



Tail extremely small and short like an appendage. Body 

 entirely naked. Two dorsal fins on the tail, without spine, 

 caudal fin well developed. Nostrils round, open, without valves. 

 Teeth tri-cuspid, with very slender points. Spiracle immediately 

 behind the eye. An electric apparatus on each side of the head. 



Australia. 



• 1113. Hypnos subnicrum, Dum. 



Eev.Zool. 1852, p. 279, pi. 12.— Gunth., Cat. Fishes, VIIL, p. 453. 



Eyes minute ; spiracles fringed. Upper parts black, with or 

 without white spots. 



Port Jackson, West Australia. 



