1865.] MOLLUSCAN FAUNA OF SOUTH AUSTRALIA. 645 
Station. Burrowing in sand, on shores exposed to the surf. 
Hab. Encounter Bay, near the sea-mouth of the Murray ; also 
Tasmania. 
A solid, flexuously-wrinkled species. 
12. TRIGONELLA POLITA. 
Mactra polita, Chemnitz, Conch. Cab. vi. p. 222, f. 216, 217. 
M. glabrata, Schroter. 
M, australis, Lam. 
Station. Burrowing on sandy shores, beyond tide-marks. 
Hab. Spencer’s Gulf and Encounter Bay. 
This species is more or less banded with light ashy and violet. 
13. TRIGONELLA PURA. 
Mactra pura, Deshayes, Proc. Zool. Soc. 1853, p. 15. 
Station. The same as the preceding. 
Hab. Spencer’s Gulf; Hardwick Bay. 
A solid, ivory-white species, which ranges westward to Swan River. 
14. *TRIGONELLA AMYGDALA. 
Mactra amygdala, Crosse et Fischer, Journ. de Conch. 1864, 
p-. 349. 
Station. In sand, near tide-marks. 
Hab. Head of Spencer’s Gulf. 
A small, white, oval species. 
15. *SpPISULA ADELAIDE. 
Spisula adelaide, Angas, MS. 
Station. In estuary mud, amongst mangrove-swamps. 
Hab. Port Adelaide Creek. 
16. *MuLINIA PINGUIS. 
Mactra (Mulinia) pinguis, Crosse et Fisch. Journ. de Conch. 
1864, p. 349. 
Station. Unknown. 
Hab. Port Lincoln. 
17. LurRARIA RHYNCHANA. 
Lutraria rhynchena, Jonas, MS. (Mus. Cuming.) ; Reeve, Conch. 
Icon. (Lutraria) pl. 4. f. 16. 
Station. Dredged on oyster-banks. 
Hab. Port Lincoln. 
A fine species, obliquely arched, with the anterior end beaked and 
openly gaping. 
18. LurrRARIA PHILIPPINARUM. 
Lutraria philippinarum, Deshayes, P. Z. 8. 1854, p. 71. 
Station. Same as the preceding. 
Hab. Port Lincoln. 
