FRESHWATEE SHELLS OF AUSTRALIA. 259 



rather agrees witli Lea's description of them, " plicis numerosis, 

 crebris," than with Eeeve's, "plicis varicosis, distantibus." 



There are several specimens in the Museum, received from 

 Mr. J. E/. Elsey from JST. Australia, which differ from the normal 

 form in having the last whorl less ventricose, streaked and spotted 

 with reddish brown, and the whorls of the spire a little angulated 

 at the upper part. These differences, however, are scarcely suf- 

 ficient to distinguish them specifically. 



4. Melania CAEBOisrATA, Beeve. 



Melania carbonata. Reeve, Con. Icon. fig. 88 ; Brot, Con.-Cab. p. 153, 

 pi. xix. fig. 3. 



Hah. Port Essington {J. B. JuJces and Gould). 

 The mouth of this species is usually not quite so broad as 

 Eeeve's figure represents it, and the colour rather browner. 



5. Melania tuberculata, Muller. 



.Hah. Upper Brisbane Eiver, Queensland {Brazier). 

 I am not aware that this very widely-distributed species has 

 been before recorded from Australia. 



6. Melania onca, A. Adams Sf Angas. 



Melania (Melasma) onca, A. Ad. Sf Ang. Proc. Zool. Soc. 1863, p. 4 15 j 



Brot, Con.-Cab. ed. 2, p. 330, pi. xxxiv. fig. /• 

 Hah. Adelaide Eiver, N. Australia. 



7. Melania denisoniensis, Brot. (Plate V. figs. 4-8.) 

 Melania denisoniensis, Brot, Con.-Cab. p. 234, pi. xxv. fig. 6 a-b. 

 Hah. Port Denison, Queensland (Brot ) ; Burdekiu Eiver, 



Cardwell and Eockhampton (Brazier). 



The series of this species sent to the Museum by Mr. Brazier 

 exhibits very considerable variation. The specimens, with one 

 exception, described by Brot, on the other hand, were very similar, 

 exhibiting only a difference in the prominence of the keel or 

 angulation on the last whorl, and in the amount of the transverse 

 striation. The largest shell in the series before me is very 

 minutely spirally striated, with rather high whoi'ls, and the aper- 

 ture longer than usual. It would, if complete, have been about 

 GO millim. in length and IG in diameter. It is of a very dark, 

 almost black, colour, and traces of spots beneath the thick 

 epidermis can be detected below the suture of some of the upper 



