266 ME. E. A. SMITH ON THE 



tlie periphery, greenisli beneath it. Spire livid, purplish. Whorls 

 5, moderately convex, minutely spirally striated. Striae raised, 

 subgranular through being crossed by fine lines of growth. Last 

 volution not particularly swollen, exhibiting in some specimens a 

 faint obtuse angulation at the middle. Aperture irregularly 

 broadly ovate, somewhat acute above, and a trifle effuse or pointed 

 at th.e base, occupying about five ninths of the whole length ; the 

 lower half of it is whitish, with, a red stain at the base near the 

 columella and at some distance from the basal margin of the peri- 

 stome ; the upper half corresponding with the exterior is darker 

 in colour. Peristome but very little reflexed on the columellar 

 side. Callus uniting the upper extremity and the columella very 

 thin. 



Length 19 millim., diam. above aperture 12 ; mouth 10 long, 

 7^ wide. 



I£ab. Victoria Eiver, N. Australia (J". JR. Elsey). 



This species may be known from V. suhlineata by its rather 

 narrower form, more conical spire, difference of colour, little wider 

 umbilicus, narrower aperture and the red stain within it. The 

 division of colour on the upper and lower part of the last whorl is 

 more marked in some specimens than in others. The upper or 

 dark colour in some examples exhibits faint indications of ob- 

 scure narrow bands. The operculum is reddish, darker at the 

 nucleus. 



Genus Larina. 



22. Laeina Steaugei, A. Adams. 



Larina Strangei, A. Adams, Proc. Zool. Soc, 1854, p. 41, pi. xxvii. fig. 3. 



Sab. Moreton Bay (Adams) ; Mackenzie Eiver {Brit. Mus.). 



This genus was supposed by Adams to be marine. It has, 

 however, very close relationship with Vivipara on account of the 

 similarity of the opercula ; and it is undoubtedly a freshwater 

 form, as is clearly proved by the Museum specimen, obtained in 

 the Mackenzie Eiver by the Port-Essington Expedition during 

 the year 1845. 



Genus Bithinia. 



23. BiTHiNiA veetiginosa, Frauenfeld. 



Bithinia vertiginosa, Frauenfeld, Verhandl. zool.-bot. Vereins Wien, 



1862, p. 1162, 1864, p. QQb, 1865, p. 527, pi. ix. 

 Sab. New Holland {Frjld.). 



