On some New Marine Mollnsca. 65 



Shell small, narrowly ovate, clothed with a sordid rugose 

 periostraca, slightly diaphanous, dusky in colour; whorls 

 three and a half to four, conspicuously angulate and flattened 

 above, at the angle (and on the last whorl distinctly) keeled, 

 keels rounded, raised ; at the suture narrowly canaliculate, 

 aperture oval, produced anteriorly ; labrum thin, sinuous at 

 the keels, inner lip reiiexed, subumbilicate. 



There is a faint resemblance between this shell and the 

 New Zealand P. tahidata of Gould. 



Bythinia Victoria, 7i.s. B. t., miniita, turhinato-cono- 

 idea, viride lutea, sericea, ijeriostraca atra ])lvyS minusve 

 induta; anfr. 4J-5, rotundato-convexis, Icevibus, longitud. 

 tenuiter rugoso stviatis ; apice ohtuso, apevtura ovata, intus 

 castanea, vel alba, lahro tenui, labio vix reflexo. 



A minute shell, whose size, silky appearance, fine longitu- 

 dinal striae, and turbinately conical form, distinguish it from 

 all its Australian congeners. Lake Connewarre, Geelong. 

 Found in great numbers in Gonfervw by W. Kershaw. 



Art. X. — On Various Forms of Galvanic Battery. 

 By R. L. J. Ellery, F.R.S., F.R.AS. 



[Read August 9th, 1877.] 



g2 



