80 



horny ; wliorls 4 to 4|, convex, dilated at tlie base, suture deep, 

 aperture ovate, oblique, peristome simple, sinuated. Diara. 5,, 

 base 3|, height 1 mill. 



Habitat, still waters throughout the island. 



PALUDESTEINA. 



Under the head of this genus Mr. John Brazier, C.M.Z.S., 

 has described the following species (See Proceedings of the 

 Zoological Society of London, for the year 1871, pago 696, 

 " Descriptions of seven new species of Helix, and of two 

 fluviatile shells from Tasmania, by John Brazier, C.M.Z.S.) : — 



Paludestrixa legrandiana. — Shell elongately conical, 

 thin, semi-pellucid, greenish horn color, under a dark epi- 

 dermis ; whorls 6|, somewhat flattened, the last three keeled 

 between the suture, and furnished with small, solid, stunted 

 hair-like spires, (as seen under the lens) of a bright, trans- 

 parent horn color, flattened on the top ; aperture ovate, 

 margins continuous, thickened, outer lip reflected. Length 

 2| lines. Breadth 1^ lines. Hab., Salmon Ponds, New Nor- 

 folk, Tasmania (Legrand.) This species is allied to Paludes- 

 trina Salleana, Fischer from Auckland, New Zealand. 



Paludestrina -wisemaniana. — Shell elongately conical, 

 thin, semi-diaphanous, epidermis light green ; apex acute ; 

 whorls 6 to 6| ; convex smooth, grooved at the suture; aperture 

 ovate ; mai'gins continuous, moderately thickened, columellar 

 margin reflected, outer lip edged with gi'een and reflected. 

 Length 2 lines. Breadth 1 line. Hab., near Hobart Town, 

 Tasmania, common in all creeks. Legrand and Petterd." 



So far Mr. Brazier, but I must add that I have been unable 

 to find either of the above shells nor anything resembling 

 them in Mr. Legrand's extensive collections. I am unable to 

 communicate with Mr. Brazier, as he has sailed for New 

 Guinea in Mr. McLeay's expedition. I am obliged, therefore, 

 to conclude that some mistake has occurred in transmitting 

 the specimens. No such shells exist in Tasmania as far as at 

 present known. 



BIVALVES. 



UNIO. Philippson. 



Unio moretonicus. Sow. TJ. testa late oblonga, latere antico declivi- 

 rotumlato, posticu oblique angulato, deinde oblique truiicato ; fusco 

 nigricante. 



Shell broadly oblong, anterior side slopingly rounded, pos- 

 terior obtusely angled, then obliquely truncated; fuscous black. 

 Length 70, breadth 41, height 30 mill. 



Tasmania, in the northern rivers, but not in the southern. 

 The name has been applied under the idea that it is found in 



