752 STUDIES ON AUSTRALIAN MOLLUSCA, xii., 



This was identified by Angas as S./u7iiculata{NoA) of Reeve. 

 But that Tasmanian species differs by being more solid ^ narrower, 

 taller, with sharper contrast between light and dark stripes, and 

 fewer coarser radials. From the example in South Kensington 

 Museum, I considered that S. blainvillei Hanley,* was an elevated 

 form of yS./unicidata. In the same collection are two tablets of 

 iS. virgulala; one, a set of four, was from Manly, the other, a set 

 of three, had been first labelled " funiculata," and then corrected 

 to " not funiculata." Nearer to our novelty than funictdata is 

 S. zonata Ten. -Woods,! ^vhich is taller, narrower, darker in 

 colour, more coarsely and evenly sculptured, and ranging from 

 Tasmania to Victoria, and South Australia, being the Adelaidean 

 correspondent of the Peronian vlrgulata. 



Besides this misidentification of S. funiculata^ Angas ap- 

 parently Avas mistaken also in recording .S'. denticulata, S. coch- 

 lear if ormis, and S. atra from New South Wales. After purify- 

 ing ihe genus by their exclusion, I can add Siphonaria stoivce 

 Verco,! of which I have collected several specimens in Middle 

 Harbour. 



Retusa iredaleana, sp.nov. 

 (Plate Ixxxv., figs.93, 94.) 



Shell small, cylindrical, rounded anteriorly, truncate pos- 

 teriorly. Colour dull white. Sculpture : tine radial threads 

 which enlarge and curve in on the vertex. Aperture anteriorly 

 pyriform, medially narrow and constricted, posteriorly rising 

 above the last whorl and looped over towards the axis, a small 

 oblique plait on the columella. Spire deeply sunk, the summits 

 of previous whorls visible, sculptured by transverse riblets de- 

 scending to a papillary apex. Length, 3; breadth, 1*5 mm. 



^a6.— Middle Harbour, Sydney (self). This is like R. amphi- 

 zosta from North Queensland, but lacks spiral sculpture, is not 

 as compressed at the waist, has the aperture carried up higher, 

 and the spire more deeply sunk. From Portsea, Victoria, Messrs. 



*Hanley, Proc. Zool. Soc. 1858, p. 153. 



t Ten.-VVoods, Proc. Roy. Soc. Tasni., 1877(1879), pp. 47, 99. 



ItVerco, Traus. Roy. Soc. S.A., xxx., 1906, p.223, PI. vii., f.3-8. 



