6 Chapman and Gabriel: 



Class PELECYPODA. 



Fam. Leptonidae. 



Genus Erycina, Ijamarck. 



Erycina helmsi, Hedley. 



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

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



This species was first described from the Zostera-heds at Deewhy 

 Lagoon, N. S. Wales. In Victoria it has occurred at Port Melbourne, 

 Corio Bay, Altona Bay, Port Albert and Lakes Entrance. It is fairly 

 abundant in the Warrnanibool fossil deposit. 



Owing to the apparently sliglit difference between the fossils and the 

 figured type we have conferred witli Mr. Hedley as to their specific 

 agreement, and he has kindly examined thein, together with living- 

 specimens from Lakes Entrance and his own type specimen, and notes 

 a possible difierence in the fossils in "that the long end is more pointed 

 in the fossil and more rounded in the recent." We find, however, every 

 degree of variation in this respect, within small limitations, and there 

 seems hardly enough evidence to warrant even a varietal distinction. 

 The finely contused or pitted surface is as well marked on the fossil 

 specimens as on tiie recent. 



Fam. Veneridae. 



Genus Marcia, H. and A. Adams. 



Marcia nitida, Quoy and Gaimard sp. 



Venus nifida, Quoy. and Gaimard, 1835, Voyage Astrolabe, 

 Zool., vol. III., p. 529, pi. LXXXrV., figs. 13. 15 (in the 

 text figs. 13, 14 in error). 

 Chione fumigata, Sowerby sp., Pritchard and Gatliff, 1903, 



Proc. R. See. Vict., vol. XVI. (N.S.), pt. I., p. J 23. 

 Chione nifida, Q. and G. sp., Hedley, 1904, Proc. Linn. Soc. 

 N.S. Wales, vol. XXXIX., p. 194. Pritchard and 

 Gatliff, 1906, Proc. R. Soc. Vict., vol. XVIII. (X.S.). 

 pt. II., p. 67. 

 Marcia nitida. Q. and G. sp.. Hedley, 1917, Proc. Linn. Soc. 

 X.S. Wales, vol. XLI., p. 691, pi. XLVI.,figs. 2, 3. 

 The generic name of this shell, more faniiliarly known as Chione 

 or Tapes fuwi gains, has lately been the subject of discussion by 

 Messrs. Dall and Jukes Browne, and their arirument is strongly in 



