50 THE PROCEEDINaS OF THE LINNEAN SOCIETY 



anal with one spine and eight rays ; pectorals extending to the 

 base of the anal ; preserved in liquor the fish appears black with 

 the fins lightly marbled with yellow. 



The specimen is three and a half inches long. 



MUGIL DOBULA, Guntll. 



Mugil dobula, Gunth. Cat. vol. Ill, page 420. 



Head moderately broad ; body of a long oval ; pectorals not 

 extending to the perpendicular drawn from the base of the 

 dorsal ; an adipose eyelid. This species has been observed in 

 several rivers in New South Wales. 



Mugil compressus, Gunth. 



Mugil compressus, Gunth. Cat. vol. Ill, page 49. 

 Body very much compressed, very high at the base of the first 

 dorsal ; head nearly pointed ; no adipose eyelid. 

 Inhabits also the rivers of New South Wales. 



Arius australis, Gunth. 



Arius australis, Gunther Proceedings of the Zool. Soc. 1867, 

 page 103. 



The largest specimen is about seven inches long ; the caudal 

 is very strongly forked ; general colour silvery ; the upper parts 

 scaley. 



Note.— The specimen described by Dr. Gunther was much larger, and came from the 

 Hunter river. 



Plotosus elongatus, Cast. 



Plotosus elongatus, Cast. Proceedings Lin. Soc. of N. S. W., 

 vol. 11, page 237. 



Two specimens about eight inches long ; colour of a dark 

 brown with the lower parts silvery. 



Note. — There are also several very young and immature specimens of a Siluroid belonging, 

 I believe, to the genus Plotosus but having the end of the caudal slightly rounded and not 

 prolonged as in the preceding species. 



Belone krefftii, Gunth. 



Belone Jcrefftii, Gunth. Cat. vol. VI, page 250. 



A very large sort, remarkable for its compressed tail ; the head 

 is contained twice and a half only, in the total length without the 

 caudal fin. The largest specimen is over 22 inches long. 





