10 



Genus — Rhabdogoxium, Reuss. 

 96. t^. sj). Two shells, one a remarkably line example of a 

 R]iahdogo7iium with symmetrical outline and strongly developed 

 tricarinate test, were obtained from the Upper Bed. I have 

 little doubt that they represent an undescribed species, but the 

 specimens have been unfortunately mislaid, and therefore cannot 

 be determined at present. 



Genus— Cristellapja, Lamarck. 



97. *C. rotulata, Lamk. Lower Bed, rare. 



98. *C. cultrata, Mont. Lower Bed, rare. 



99. *C. articuJata, Rss. Lower Bed, ratlier scarce. 

 100. *C. convergens, Borne. Lower Bed, very rare. 



lOL ^C. tricarinella, Rss. TiOwer Bed, rare. Recent specimens 

 have been obtained from three localities, all in the Western 

 Pacific. 



Genus — Polymorpiiixa, cVOrhigny. 



102. "^P. regina., Br. P. & J. A few rather fine examples. 

 Lower Bed. 



103. P. ehgantissima, P. k J. This fine species is most at home 

 in recent waters on the eastern shores of Australia from Torres 

 Straits to Bass Straits. In the Muddy Creek beds it is a common 

 form, but very variable in contour. Specimens can be found in 

 every intermediate stage, from a nearly circular outline in one 

 direction to sub-cylindrical in elongated varieties. Lower and 

 Upper Beds, common. 



104. P. oblonga, d'Orb. Lower Bed, very rare. Upper Bed, 

 rather scarce. 



105. P. gibba, d'Orb. Lower Bed, a moderately common form, 

 including some fistulose examples. Upper Bed, rather scarce. 



106. P. lacfea, W. &:. J. Rare in both Lower and Upper Beds. 



107. *P. lactea, var. oblonga, Will. Lower Bed, very rare. 



108. P. communis, d'Orb. Rather scarce in both Low^er and 

 Upper Beds. 



109. "^P. orafa, d'Orb. Lower Bed, rare. 



110. *P. clisjKir, Stache. A strong, compressed, inequilateral 

 and twisted shell, determined by Prof. Stache from examples, 

 obtained from the New Zealand Tertiaries. Lower Bed, mode- 

 rately common. 



111. fP. rotunclata, Born. Upper Bed, rare. 



112. ^P. comjjressa, d'Orb. Upper Bed, moderately common. 



Genus — Uvigerixa, cTOrbigny. 



113. ^Z7. Cana.riensis, d'Orb Lowxr Bed, rather scarce. 



114. t ?7. i^ygmaea^ d'Orb. Upper Bed, very rare. 



