117 



ON A NEW SPECIES OF AMPULLARIA. 



Bv THE Rev. J. E. Tenison-Woods, F.G.S., F.L.S., 

 Cork. Mem, Koy. Soc. Tas., Sydney, &.g. 



I bcsi' to briiiii- niulcr the uotiec of tlic Society a new 

 species of Ampiillarid, a j;enus hitherto mikiiown in the 

 Australias. Some time since I described all the known 

 freshwatei- sliells of the island which dnly appeared in last 

 year's transactions. Since then I have described a new 

 Valvuta, V. tasmamca which was discovered by that most 

 indnstrious cntomoloo'ist, Aug. Simson, who obtained it 

 from a creek in (ionld's Country. Since then in looking 

 over some shells kindly placed at my disposal by Ronald 

 Gunn, Esq., F.L.S., 1 have found the Ampullaria which I 

 now descril)e. Tt is small in size, but very interesting from 

 the fact that it is the only species of that very large genus 

 wiiieh has ^et been fomid in any part of Australia. For- 

 tunately, though the collection of individuals was small, 

 yet the most of them had the operculum in situ, which 

 enabled racto pronounce that it is shelly. The genus has 

 only been studied of late years, and is found best repre- 

 sented in South America, where it attains a large size, and 

 presents beautiful varieties of colouring. I was unable to 

 ascertain the precise habitat from Mr. Gunn, who was, 

 however, certain that it was obtained from some of the 

 rivers emptying themselves on the north coast. 



A'MPULLARIA TASilAN'ICA. U.S. A.f. pCD'Ca, ."Ulliijluhosa, coviiea, 

 xpira hrevi, uhtusa, epkhrmide atro-olimcea, induta ; cmfractlbiis 4, 

 .tnhito decresceidihus ; apertnra lata, simplici, postlce aiKjulata ; lahio 

 alba, conspicua, concava, rejlexu, fauce cetate albicarde. Operculum 

 stnbconvexnm, la'vigatnm epidennide {';) ulivacea iiidntum. 



Shell small, subglobose, horny, with a short obtuse spire; 

 epidermis blackish olive ; whorls 4, rapidly decreasing, 

 aperture wide, simple, angulate posteriorly, inner lip white 

 conspicuous, reflexed, concave ; throat beeomiug whitish 

 with age. Operculum, sub convex, smooth, with an olive 

 epidermis (?) 



Diam. maj. 3\, rain. .1 mil. 



This little ampullaria has no determinate characters 

 except its small size, dark color, and white concave inner 

 lip. The penultimate whorl is rather gibbous. 



