90 Proceedings of tJic Royal Society of Victoria. 



Locality. — Eocene beds of Table Cape, Tasmania. Three 

 examples. Also in the lower eocene beds of Spring Creek, near 

 Geelong, Victoria. 



Observations. — The present species apparently shows more 

 affinity with P. affinis, Tate, from the same beds than any other 

 hitherto described species, as far as I can make out, but owing 

 to the very brief original description of this species it was not an 

 easy matter to fix its representatives with certainty. From the 

 specimens in the present collection I have identified as P. affinis 

 the present described species differs in that the whorls are slightly 

 more convex, the cost?e do not extend from suture to suture, 

 but fade away before reaching the posterior suture, the costaj 

 are broader, and on that account appear more crowded, the 

 stronger spiral threads are finer and closer together, and the 

 intercalated finer threads are fewer and not of a uniform size, as 

 in P. affinis, which has six or seven fine intercalated threads of 

 uniform size. Further, in P. affinis the transverse striaa are much 

 more strongly developed, being nearly as strong as the inter- 

 calated threads, thus giving rise to a very fine, neat, and regular 

 cancellation ; also the crossing of the regular and nari'ow costse 

 with the stout spiral threads gives rise to a coarse cancellation, 

 which is entirely absent in the new species. Also the columella 

 of the new species is more slender and the canal narrower. This 

 new species shows a certain amount of variability in the number 

 and development of its costie, but the remainder of its characters 

 appear to be fairly constant. In the Spring Creek representatives 

 the costt^ are as a rule fewer in number, ranging from about eight 

 to eleven on the l)ody-whoi'l. 



22. Ricinula purpupoides, Johnston. 



Ricinula pi/rpiiroides, Johnston, P.R.S.Tas , 1879, p. 33. 

 Pisania ptirpuroides., Tate, Gast. I., 1888, p. 165, pi. xi., fig. 6. 

 Ricinula purpuroides, Tate, P.R.S.X.S.W., 1893, p. 173. 



23. Zemira praecursopia, Tate. 

 Id., Tate, Gast. I., 1888, pp. 1G3, l(i4, pi. xi., fig. 5. 



24. Phos lipaecostatus, T. Woods. 



Coniinella lynecostata, T. Woods, P.R.S.Tas., 1876, p. 108. 

 Phos linecostatjis, Tate, Gast. I., p. 167, pi. xi., fig. 12. 



