78 CONTRIBUTIONS FOR SYSTEMATIC CATALOGUE AQUATIC SHELLS. 



Hydrohia, because Tryon retains it for small turbiuately 

 elongate shells inhabiting brackish water. The animal is 

 thus described : " Rostrum rather long, tentacles somewhat 

 tapering, but blunt at extremity, foot somewhat pointed 

 behind." I have not had an opportunity of examining the 

 arrangement of the teeth in tlie radular. Many of the 

 examples from the River Styx have Serpuhc, and marine 

 Polyzoa attached to them, the corrosion often extends to the 

 body-whorl. 



Tatea eufilabris. a. Adams. 

 Plate II. Fig. 1. 

 Biala rufilabris, A. Adams, Ann. and Mag. N. Hist., 1862. 

 Hydrobia rufilabris. Smith, pro. Zool. Soc, 1875. 

 Bythinia Hiioneiisis, Tenison- Woods. Pro. Royal Soc, Tas., 



1875. 

 Taica JIuoiicnsis, Tenison- Woods, op. cit., 1878. 



Operculum, thin, brownish, horny, paucispiral, with a vertical 

 submarginal claw. 



Habitat. — Port Lincoln, S.A. (Adams), Clarence River, 

 N.S.W. (Brazier), near Melbourne, Victoria (Woods) ; in Tas- 

 mania it has l)een collected at the following localities: — Huon 

 River (Woods, Legrand, and Beddome), opposite Risdon near 

 Hobart (Simp<!on), George's Bay (Sim]»sou), River Don Heads 

 (Hull), Rivers Leven and Forth (Miss Lodder). In Tidal 

 Creek at the head of North-West Bay and obtained living with 

 the dredge in from 5 to 7 fathoms of water, 300 to 400 yards 

 off sliore at the same locality (Beddome). I have collected it 

 in many localities, including several of the above ; at many 

 favourable places in the Tamar river it is plentiful and near 

 Bridport it lives in great profusion. 



The identity of the Rev. Tenison-Wood's shell with tint 

 dcscriljed by Mr. A. Adams was proved l)y Mr. E. A. Smith 

 (On the fresh-water shells of Australia. The Journal of the 

 Liu. Soc. of London, 1882), The fact of its being obtained 

 alive in from 5 to 7 fathoms of water by Mr. C. E. Beddome 

 is very intesesting, the examples did not show any variation 

 of the shell. The figure of Mr. Smith does not represent the 

 ordinary fonn of the pj)ecies. 



Hydrobia Tasmanica. V. Martens. 



" Weigmann's Archives for Natural Science, 24. Vol. 1., 

 page 185. PI. V. Fig. 12, 1858. 



Shfll, 2^ to 3 M M. long, conical, acute and consisting of 

 41 to 5 arched whorls of regularly diminishing sizes ; 

 suture moderately deep (angle of tangent about 35 degrees), 



