373 



Chione dimorphophylla, Tate. 



18S7. Chione dimorphopliylla, Tate, Trans. Eoy. Soc. South Aust. vol. ix. 



p. 155, pi. XV. figs. ia-h. 

 1893. Chione diinorphophylla, Tate and Dennant, id. vol. xvii. pt. 1, p. 225. 



Shell large, ovate, regularly rounded anteriorly ; umbones directed 

 ■well forward, incurved ; pallial sinus deep, angulate, reaching almost 

 to the centre of the shell ; margin crenulated ; surface of the ex- 

 terior ornamented by prominent, elevated concentric lamellae, 

 between ■which are closely-set radial lineations ; lunule ■well im- 

 pre.'ised, concave. 



Dimensions. — Height 49 mm. ; length 60 mm. 



Fvrm. and Loe. — Eocene : Victoria and South Australia. 



L. 4833. Eight valve of the adult ; from Muddy Creek. 



Presented hj John Dennant, Esq. 

 L. 6604, L. 9870. Left valves ; from Muddy Creek. Purchased. 



L. 10591. Several examples of both valves; from the River 

 Murray, near Adelaide. Presented by Wm. Evans, Esq. 



Chione dictua, Tate. 



1887. Chione dictna, Tate, Trans. Eoy. Soc. South Aust. vol. ix. p. 158, 

 pi. xvi. fig. 2. 



Shell transversely-oblong, depressed, narro-wed and obliquely 

 truncate posteriorly ; chiefly characterized by the surface being 

 ornamented with small radial costae, decussated by concentric 

 striie ; lunule lanceolate, defined by a deep groove, ■within ■whiclj 

 are u fe^w lamellae of gro^wth. 



Dimensions. — Height 9'5 mm. ; length 12"5 mm. 



Fonn. rtwrfZoc— Miocene: Iliver Murray cliffs. South Australia. 



L. 9889. Examples of both valves. Purchased. 



Chione cainozoica, Tenison-Woods (sp.). 



1877. ^'^■nl(s [Chione) cainozoica, Tenison-'U^oods, Pap. Roy. Soc. Tas. 1876, 

 p. 113. 



1887. Chione cainozoica, Tate, Trans. Roy. Soc. South Aust. vol. ix. p. 150, 



pi. xvi. figs. 'ia-b. 



1888. Chione cainozoica, Johnston, Geol. Tasmania, p. 233, pi. xxxii. 



figs. 8-8«, 11-lltf. 



