101 



119. Carditella subtrigoxa, Tate, antea, p. 70, t. 4, f. 10. 

 Cast up, Streaky Bay. 



Ovate- sub trigonal, with fourteen broadish radiating costae ; 

 about one-fourth inch long. 



Family TIntonidje. 



120. Unio Stuarti, A. Adams and Angas (Alasmodo?i), 

 P. Z. S.j 1863, p. 417 ; Anodon Stuarti, Sowerby, in Reeve, 

 Mon., t. 34, f. 136, 1870. 



Various freshwater streams in the Lake Eyre Basin, as at 

 Mount Margaret! the type locality (Waterhouse); at Umbum, 

 40 miles south from Peake ! ; Cooper's Creek, at Innamincka ! 

 Also Newcastle Waters (Waterliouse !) 



An elongate-ovate shell, about twice as long as wide ; pos- 

 terior side long, obliquely subtruncate ; hinge line straight. 

 Length, four inches. 



121. Unio Evaxsi, A. Adams and Angas (Alasmodon), 

 P. Z. S., 1864, p. 39 ; id., Eeeve, Mon., t. 56, f . 285, 1867. 



In the actual bed of the River Murray, and therefore appar- 

 ently rare, I have taken it several times from the stomach of 

 the " Murray cod." 



A thick elongate-ovate shell, about twice as long as wide, 

 with the dorsal line arched, attenuated and somewhat angul- 

 ated posteriorly. Length, four inches. 



122. Uxio depressus, Lamarck, Ans. s. Vert., vii., p. 79 ; 

 U. mutabilis, Lea, Obs. on ITnio, vii., p. 66, t. 38, f. 167. 



Very abundant in the lagoons bordering the River Murray 

 and in Lake Alexandrina ; also New South "Wales. 



Quadrately-ovate, nearly as broad as long, thin, depressed ; 

 hinge line nearly straight, short ; truncated posteriorly. Length, 

 from two to three inches. 



123. L T xio yittatus, Lea, Obs. on Unio. vii., p. 67, t. 39, 

 f. 128 ; Z7. ambiguus, Philippi. 



Rivers Para, Torrens, and Onkaparinga ; Scott's Creek, a 

 tributary of the R. Bremer ; Mosquito Creek, near Xarra- 

 coorte ; also Queensland. 



Ovate-oblong, somewhat thick and inflated ; dorsal line 

 arched, somewhat ascending posteriorly ; posterior margin 

 roundly truncated. Length, about three inches ; breadth, two 

 inches. 



Family Trigojstid^:. 



124. Trigoxia margaritacea, Lamarck, An. s. Vert, vi., 

 p. 63; Reeve, Mon., t. 1, f. 3. 



Dead shells, Holdfast and Aldinga Bays. Dredged in life 



