1863.] ON NEW AUSTRALIAN FRESHWATER SHELI-S. 415 



olivaceo-viridibus transversis ornatis ; anfractu ultimo inflato, 

 lineis duabus impressis ad peripheriam instructo ; apertura 

 ovata, postice subangulata ; labia simplici ; labro acuta. 

 Long. 2 inches, lat. 1 inch 8 lines. 



Hab. Newcastle Waters, Arnheim's Land {Coll. Angas.). 

 This fine species most nearly resembles V. ussuriensis, Gerst. ; 

 but the last whorl is more inflated, and the surface of the shell is 

 not malleated or lirate. It is the largest species yet discovered on 

 the Australian continent. We have great pleasure in dedicating it 

 to F. G. Waterhouse, Esq., who, under great difficulties during the 

 expedition, succeeded in making many valuable additions to science. 



2. ViVIPARA KINGI, Ad. & Ang. 



V. testa turbinata, globoso-conica, umbilicata, spira mediocri 

 erosa nodulosa, epidermide tenui pallide fusco-viridi obtecta, 

 ad apicem purpurascente ; anfractibus convexis, lineolis trans- 

 versis et langitudinalibus elevatis decussatis, anfractu ultimo 

 ad basin sulcis impressis spiralibus histructo ; apertura ovata, 

 antice subeffusa ; labia vix refiexo. 

 Long. 1 inch, lat. 8 lines. 



Hab. King's Ponds, Arnheim's Land {Call. Angus.). 

 This is a neat, finely decussated, concolorous species, with the 

 upper whorls nodulous from erosion, as in V. prcerosa, Gerst. It 

 is named after Mr. Stephen King, one of the gentlemen who accom- 

 panied the expedition. 



3. Melania (Melasma) onca, Ad. & Ang. 



M. testa fusif ormi-turrita ; spira elata, conic a ; epidermide pal- 

 lide olivaceo induta, rufo-fusca, pulcherrime maculata, maculis 

 scppe in lineis undidatis longitudinalibus dispositis ; anfractibus 

 planis, longitudinaliter plicatis, plicis aqualibus regularibus 

 subdistantibus, ad suturas nodulosis ; apertura oblongo-ovata, 

 antice effusa ; labia subincrassata ; labro simplici, acuta. 

 Long. 1 inch, lat. 4 lines. 



Hab. Tributary of Adelaide River, Arnheim's Land {Coll. Angus.). 



A species remarkable both for the elegance of its form and the 



beauty of its painting. The whorls are plicate, with a necklace-like 



series of nodules at the sutures ; and the shell is covered with dark 



red-brown spots, suggestive of its specific name. 



4. Amphipeplea vinosa. Ad. & Ang. 



A. testa ovata ; spira mediocri, tenui, semipellucida, vinosa ; an- 

 fractu ultimo magna, ventricosa, postice ad suturas gibboso ; 

 apertura ovata ; labia callo tenui mediocri obtecta, columella 

 spiraliter tortuasa; labro convexo, margine acuta. 

 Long. 9 lines, lat. 5 lines. 



Hab. Tributary of Adelaide River, Arnheim's Land {Coll. Angus.). 

 This species may readily be distinguished on account of its pecu- 

 liar vinous colour. The whorls are posteriorly gibbose or tumid at 

 the sutures, and the callus is less spreading than in others of the 

 genus. 



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