Ostracod and Shell Marl of Pleistocene Age. 25 



Description of Fauna. 



PHYLUM MOLLUSCA. 



Class PELECYPODA. 



Earn. LEPTONIDAE. 



Genus ERYCINA, Lamarck. 



Erycina helmsi, Hedley. (Plate IIL, Figs. 1, 2.) 



Erycina helmsi, Hedley, 1915, Proc. Linn. Soc., N.S. Wales, 

 vol. XXXIX., pt. IV., p. 701, pi. LXXX. Figs. 37-39. 

 Chapman and Gabriel, 1917, Proc. R. Soc. Vict., vol. 

 XXX. (N.S.), pt. I., p. 6. 

 Observations. — It is interesting to meet with this little bivalve 

 in these sub-fossil deposits, in which the majority of forms are of 

 freshwater habitat. The localities where it is found living are Dee 

 Why Lagoon, New South Wales; and in Victoria, at Port Mel- 

 bourne, Corio Bay, Altona Bay, Port Albert and Lakes Entrance. 

 Mr. C. J. Gabriel and the author also recorded it (loc. supra cit.) 

 from the Pleistocene deposits underlying volcanic tuff near Warr- 

 .nambool, where it occurred abundantly in association with many 

 marine shells and a few brackish water forms. Some specimens 

 from Lake Connewarre, near Geelong, in the Dennant collection, 

 labelled *' Pisidium etheridgei,'^ also belong to the above .species. 

 At first glance, this small form might easily be mistaken for the 

 aquatic genus, Pdsidium, but an examination of the hinge-line is 

 sufficient to show the difference. 



Occurrence. — Common in the Boneo Swamp deposit. 



Class GASTEROPODA. 

 Fam. TRUNCATELLIDAE. 

 Genus COXIELLA, E. A. Smith. 

 Coxiella striatula^ Menke sp. (Plate III., Fig. 3.) 



Truncatellm striatula, Menke, 1842, Moll. Nov. Holl., p. 9. 

 Blamfordia injrrho stoma. Cox, 1868, Mon. Austr. Land 



Shells, p. 95, pi. XV., Fig. U. 

 Pomiatopsls striatula, Menke sp. Tenison Woods, 1876, 



Proc. Hoy. Soc. Tas. for 1875, p. 78. 

 Coxidla striatula, Menke sp., E. A. Smith, 1898, Proc. 



Malac. Soc, vol. III. p. 75. 

 Coxiella confusa, E. A Smith, 1898, Ibid. p. 76. 

 Coxiella striatula, Menke sp., Hedley, 1916, Prelim. Index. 



Moll. W. Austr., p. 189. 



