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 Il>/odromns, in which genus 

 G. 0. Sars has more recently placed it. 



Sars' 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, Muller. 



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



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

 pt. III. Zool. p. 68, pi. XIV., Figs, &a-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 U. aciojiunctatd, 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 m about 100 fathoms. 



It is interesting to note the above species under such widely 

 differing circumstances as to age, depth and geographical posi- 

 tion. Altliough not yet recorded from coastal dredgings round 

 Victoi-ia. C luhhoclxiania 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. PI. 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. I., Pt. III. Zool. 1-880, . 

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



