184 STUDIES ON AUSTRALIAN MOLLUSCA, VIII., 



of the species kindly placed at my disposal. This name has to 

 yield to the prior Hydrohia ppMerdi, Smith.* To the same species 

 is referred Pupa anodonta of Musson and myself,! later trans- 

 ferred to Heterocyclus. % It has, with the following species, been 

 traced by Dr. T. May as far north as Bundaberg. 



Petterdiana brazieri. Smith. 



Mr. W. F. Petterd has also kindly communicated examples of 

 his Amnicola positura,% which prove to be synonymous with the 

 earlier Hydrohia hrazieri, Smith. |j The species ought, I think, 

 to be included in the genus Petterdiana, of which it is the only 

 representative in this State. 



BiTTiUM FURVUM, Watson. 



Watson, Chall. Rep. Zool. xv., 1886, p. 556, pi. xxxviii., f. 5. 



This reference has always been a trouble to Australian students. 

 I have at last identified the shell as the young of Cerithium 

 icarus, Bayle = C. te7iue, Sowb. not Desh. = B. varieyatum, Braz. 



RissoA AGNEWi, Teiiison Woods. 



Ten. AVoods, Proc. Eoy. Soc. Tas. 1876, [1877] p. 152. 



I submitted specimens dredged in 100 fathoms 16 miles east 

 of Wollongong to Mr. W. L. May, who writes (12:ii. : 1904) that 

 he thinks they are a variety of that species, from the type of 

 which they differ by having apparently one whorl less, and by a 

 blunter apex; but with which they agree in sculpture and general 

 form. Mr. May now considers that the illustrationli given as of 

 this species really represents R. Jayardi, Petterd, a different 

 species. In the forthcoming issue of the Proceedings of the 



* Journ. Linn. Soc. Zool. xvi. 1882, p. 270, pi. vii. , f. 23. 



t These Proceedings (2) vi. 1892, p. 558. 



::: These Proceedings (2) vii. 1893, p. 373. 



§ Journ. of Conch, iv. 1884, p. 159. 



II Journ. Linn. Soc. Zool. xvi. 1882, p. 270, pi. vii., f. 21. 



^ These Proceedings, xxvi., pi. xxvi., f. 70. 



