BY PROFESSOR RALPH TATE, F.L.S., F.G.S. 89 



shell liad remained unfigured, and it lias subsequently been 

 illustrated by Tryon in 1887, and Petterd in 1889. No 

 further information of the animal has been published than 

 that given by Tenison- Woods at the two references under 

 Tatea liuo7iensis. 



On the publication of the anatomical characters of the 

 animal of Dardania (Hntton) a new genus of Eissoinse, in 

 Trans. New Zealand Institute, 1882, I could not fail to 

 recognise in it a congener with Tatea rufilibris. Both Tryon 

 and Fischer place Dardania and Taiea as subgenera under 

 Jeffreysia. Further investigations by Hutton (Proc Lin. 

 Soc, N.S. Wales, vol. ix., p. 940, 1885) have lead him to con- 

 sider Dardania synonymic with Eatonia (E. A. Smith), changed 

 by Dall to Eatoniella, because Smith's name was preoccupied. 

 In all essential characters Dardania olivacea and Tatea riifila- 

 hris agree with Eatoniella ; however, they are not of the same 

 species, differing much in the shape of the shell, and in the 

 outline of the foot. 



My observations on the animal of Eatoniella rufilabris, are 

 as follow : — Foot, when extended, between two and three times 

 as long as bioad, truncated and auricled in front, somewhat 

 narrowed in the ante-medial region, expanded and rounded 

 posteriorly ; muzzle, reddish-brown, with a colourless tip ; 

 tentacles, long, subulate, colourless, but encircled with brown 

 near the tips ; operculum, pancisperal, thick, externally 

 corneous, somewhat calcareous on inner face, provided with a 

 vertical submarginal claw, which is denticulated on its edge. 

 The animal resembles that of Amnicola, as represented by 

 Stimpson ('* Researches upon the jH'?/cZro6im«," p. 84) ; but the 

 opercular characters do not belong to that family as defined 

 by him, and are those proper to Bissoinince. 



Tatea is not synonymous with Gahbia (Tryon) as has been 

 suggested by some conchologists. An examination of examples 

 of the species, G. australis from its type-locality, proves that 

 the surmise of Stimpson that the shell is a Bythinia, is correct, 

 and justifies Brazier's interpretation of the generic characters, 

 he having independently described the same as Bitliynia 

 hyal^.na; in our conjoint "Check List of the Freshwater 

 Shells of Australia " it stands as B. australis (Tryon, sp.) 



Eatoniella rufilabris OQQMX^ at South Grafton, Clarence River, 

 N.S. Wales, and has been identified by E. A. Smith from 

 specimens received from Brazier. Examples of the same have 

 been determined by Tryon to be Amnicola hadia (Gould)^ 

 originally known from Banks Peninsula, New Zealand. How- 

 ever, the researches of Prof. Hutton on the New Zealand 

 Hyclrobiinse, in N.Z. Inst., 1882, p. 143, plate i., show that 

 Melania corolla is a Potamopyrgus, the operculum of which 

 has no internal process. I think we must vote Tryon in the 



