1867.] MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. 971 



duced posteriorly. Found in the mud at Johnson's Bay, and ou the 

 banks of the Parramatta River. Length 7 lines. 



Subfam. Lutrariin^. 



33. LUTRARIA DISSIMILIS. 



Lutraria dissimilis, Desh. P. Z. S. 1854 ; Reeve, Conch. Icon. 

 Lutraria, pi. 2. f. 8. 



Like L. rhynchcena, Jonas, but less curved and gaping. In sandy 

 mud. Middle Harbour. Washed up ou the beach at Edward's Bay 

 occasionally after storms. Length 3 inches 9 lines. 



34. ? StANDELLA OVALINA. 



Mactra ovalina, Lam. Anim. sans Vert. vi. p. 104. 



A smooth, ovate, vphitish shell, rather gaping posteriorly, with the 

 hinder slope narrowly keeled. Dredged in Middle Harbour. Length 

 ] inch 5 lines. This species occurs also at Port Phillip. 



35. Zenatia acinaces. 



Lutraria acinaces, Quoy & Gaim. Voy. de I'Astrol. iii. p. 545, 

 t. 83. f. 5, 6 ; Reeve, Conch. Icon. Lutraria, pi. 4. f. 14. 



A large, oblong, compressed shell, resembling a flattened Lutraria, 

 with the umbones anterior ; covered at the sides with an olive-brown 

 epidermis. Botany Bay, very rare. Length 4 to 5 inches. Also 

 from New Zealand, according to Quoy, Earl, and Dieffenbach. 



Fam. Tellinid^. 



Z^. Gari (Psammocola) togata. 



Psammobia togata, Desh. P. Z. S. 1854, p. 318. 



A large ovately transverse shell, obliquely truncate posteriorly, 

 white, aud clothed with a strong olive-green epidermis, more or less 

 eroded at the umbones. Length 3^ inches. Port Jackson, Port 

 Essington, and the PhiUppines. 



Externally this shell has somewhat the aspect of a Glaueonomya, 

 and may be regarded as the type of a distinct group of the family 

 TellinidcB. 



37. Gari malaccana. 



Psammobia malaccana, Reeve, Conch. Icon. pi. 6. f. 42. 



A shining white species, delicately sculptured with oblique grooved 

 strise, which suddenly terminate on the posterior side. Length 

 1 inch 3 lines. Dredged at Lane Cove, Port Jackson ; also Port 

 Denison, and Malacca (Cuming). 



38. Gari zonalis. 



Psammobia zonalis. Lam. Anim. sans Vert. vi. p. 182. 

 A compressed species, of a pale livid-brown colour, rayed with 

 white. Length 1 inch. Middle Harbour ; also Tasmania. 



