Ostracod and Shell Marl of Pleistocene Age. 29-" 



is not always represented, and in other ways, as in the thicker 

 carapace, it seems to be distinct from Ilyodromus, in which genus 

 G. 0. Sars has more recently placed it. 



Bars' specimens were hatched from dried mud taken from^ 

 lagoons in the neighbourhood of Dunedin. A female measures 1.6^ 

 mm. in length. The present examples have a length of about 1.4 

 mm. 



Occurrence. — Abundant in the Boneo Swamp material. 



Fam. CYTHERIDAE. 



Genus CYTHERE, Miiller. 



Cythere luhhockiana, G. S. Brady. Plate IV., Fig. 9. 



Cythert luhhockiana, G. S. Brady, 1880, Rep. Chall. vol. I. 

 pt. III. Zool. p. ^S, pi. XIV., Figs, U-d. Chapman,. 

 1914, Proc. R. Soc. Vict. vol. XXVII. (N.S.), pt. I. p.- 

 36, pi. VII., Fig. 17. 



Observations. — The present example of this marine ostracod 

 appears to be typical in all essentials as form, outline and orna- 

 ment, with a minor exception that the pittings are replaced by 

 smaller punctuation, as in C. acupunctata, Brady. 7 As a living 

 species, it is recorded from Booby Island, Torres Strait, in 6-8 

 fathoms. 



Fossil specimens have been recorded by the writer from the 

 Miocene and Pliocene of the Mallee bores, the deepest being 542 

 feet from the surface; these Miocene deposits, by the way, have- 

 been formed in about 100 fathoms. 



It is interesting to note the above species under such widely 

 differing circumstances as to age, depth and geographical posi- 

 tion. Although not yet recorded from coastal dredgings round 

 Victoria, C. lubbockiania probably occurs in its shallow depths; 

 and in times not far distant, this and its allies, along with the- 

 marine bivalve, Erycina helmsi, were washed in by tidal currents. 



Occurrence. — One left valve found in the Boneo Swamp deposits. 



Limnicythere sicula, sp. nov. PL IV., Figs. 10, 11. 



Description. — Valves very small;. seen from the side, subrectan- 

 gular, expanded anteriorly. Hinge-line long and straight; ven- 

 tral border incurved in the middle. Anterior margin depressed,. 



7. Cythere acupunctata, Brady, Rep. Chall. Vol. T., Pt. III. Zool. 1880.. 

 p. 68, pi. XIV., Figs. la-h. 



