[Proc. Roy. Soc. Victoria, 32 (N.S.), Pt. I., 1919]. 



Art. VI. — On an Ostracod and Shell Marl of Pleistocene Age 

 from Boneo Sivanip, West of Cape Schanck, Victoria. 



By FREDERICK CHAPMAN, A.L.S., F.R.M.S. 



(With Plates III. and IV). 

 [Read 10th July, 1919]. 



Description of Deposit. 



The dried ina.rl is of a whitish-grey colour, but when wet is 

 grey to smoke-brown. It is light in weight and cavernous in 

 places, the holes being due to the roots and stems of plants, which 

 have been enclosed in the deposit. 



The moUuscan shells are mainly of freshwater types, belonging 

 ,to the genera BvMinits and Coxiella, but the marine genus, Erycina, 

 is also well represented. 



Ostracoda are chiefly of aquatic character, as Cypris and Cando- 

 .nopsis; Limmcythere is a genusi which is usually found in streams 

 .and lakes, draining high land, and in close proximity to the sea; 

 Cy there (C. luhhockimia), though rare in this deposit, is a true 

 imarine ostracod. 



Under a high power of the microscope the fine washings are seen 

 to consist of minute rounded particles mingled with fragments of 

 •ostracoda, and a few freshwater diatoms {Gymhella). This genus 

 of diatomaceae has been previously recorded from several Vic- 

 torian localities of Pleistocene age, in deposits of a freshwater or 

 lacustrine nature, as those of Mickleham ^^det. by author), Eglin- 

 ton, Amherst, Coralulup, Splitter's Creek, Rodborough, Belfast 

 and I'albot.i 



The material is almost purely calcareous. On testing it for 

 phosphoric acid, no reaction was obtained. 



.1. See Mahony, D. J. Bull, Geol. Surv. Vict, No. 26. 1912. pp. 12, 15 and 16. 



