86 BIBLIOGRAPHY. 



brevicula (fig. 4); Eulima acutalis {^%. 5); E . permimma {fig. 6) ; 

 Brugnonia pulchella (fig. 7) — a new genus Brug/tonia is establish- 

 ed for this species which belongs to the family Solariidce. 

 Adeorbis exquisitus (fig. 8) ; and Cylichna parvula (fig. 9). — 

 J.W.T. 



On the Freshwater Shells of Australia.— By Edgar 



A. Smith, F.Z.S., Journ. Lin. Soc, vol. xvi., 1881. 



About 150 species are now known to inhabit Australia, but 

 with a few exceptions no strange or novel types are found. The 

 existence of the African genus Fhysopsis, an Uiito with tuberculose 

 surface and black epidermis and a shell described as belonging 

 to the South American group Mycetopus are the most remarkable. 

 The genus Physa would appear to be the predominant group no 

 less than 52 distinct forms being known. Unio is next in point of 

 numbers having 17 species, Melania 12, Neritina 10, Ltmnczaii, 

 Paludiiia and Corbiciila each with 9, Hydrobia ? 6, Blanorbis 6, 

 Sphcerium and Bythinia 4, Pisiditim 3, Segmentina 2, and 

 Balea, Aninicola ?, Paludinella ?, Larma, Gabbia, Ancylus, 

 Physopsis, Mycetopus, and Navicella each with one representative 

 only. 



Melafita tubercidata Miill. is given for the first time from 

 Australia, and three new species are described M. Queenslandica 

 (pi. V. fig. ir) from Queensland, M. Elseyi (fig. 12) and M. 

 subsimilis (fig. 13). 



All the Australian Vivipara have two constant peculiarities, 

 in possessing spiral sculpture and in the absence of color-bands 

 below the periphery. A form from N. Australia allied to essing- 

 tonensis is described as new under the name of tricincta (pi. vii. 

 fig. 16). A new species from Victoria River, N. Australia is 

 described as dimidiata (fig. 17). A new species oi Bythinia from 

 the last locality is named australis, it is closely allied to B. affinis 

 Brazier from Queensland. A new species of Hydrobia — Brazieri 

 (fig. 21) from Clarence River, N.S.W. ; H. Petterdi (fig. 23) 

 from Richmond River, N.S.W., and Alert River, Queensland; 

 and H. Angasi (fig. 22) from Compasely River, Victoria. Two 



J.C, iv., July, 1883. 



