14 



of an inch in length. Large specimens sometimes branched, and 

 contain over twenty chambers. This is the first record of this 

 interesting species in a fossil condition. The nearest point of dis- 

 tribution in the recent state, so far as known, is Torres Strait, 

 but the recent specimens do not appear to be so fine as those 

 irom Muddy Creek. Lower Bed, moderately common. 



Genus — PoLyTRE>rA, Jiisso. 



156. P. miniaceuin, var. alba, Carter. Small specimens, and 

 destitute of colour. Whether the absence of colour be original 

 or due to age and fossilization it is difficult to say. I have, how- 

 •ever, classed them with the variety with which, in their present 

 a,ppearance, they perfectly agree. Lower Bed, moderately com- 

 mon. Upper Bed, very rare. 



Genus — Gyps in a, Carter. 



157. G. globulus, Rss. The spherical form of Gypsina differs 

 Avidely as to the size of individuals, and is not uncommon in 

 Low^er Bed. Upper Bed, rather scarce. 



158. G. vesicularis, P. & J. Examples of the typical hemi- 

 spherical form are rare, these being replaced by individuals of a 

 tliscoid shape, with thick rounded periphery, which are common 

 in the Lower, and rather scarce in Upper Bed. 



159. "^G. inhfFy^ens, Schultze. Lower Bed, rare. The " Chal- 

 lenger " collections of this species were limited to two localities, 

 Bass Straits and south of New Guinea. 



Genus — Pulvixulixa, Parker and Jones. 



160. P. repanda, Fichtel and Moll. The typical form, passing 

 into and including the next in this list, are amongst the commonest 

 forms in the Lower Bed material. Upper Bed, rather scarce. 



161. *P. pulchella, d'Orb. A very neat little shell, with lini- 

 bate sutures. Lower Bed, common. 



162. *P. Schreibersii, d'Orb. The septation on the superior 

 side of the test is obscure, but in other respects the examples 

 xigree with the above. Lower Bed, rather scarce. 



163. "^P. Bertlielotiana, d'Orb. A few specimens of a small, con- 

 vex, many chambered, limbate shell, appear to belong to this 

 species. Lower Bed. 



164. ^P. PartscJiiana, d'Orb. Lower Bed, rather scarce. 



165. ^P. Patagonica, d'Orb. Lower Bed, rare. 



166. "^P. Hauerii, d'Orb. Lower Bed, rare. 



167. */*. auricula, Fichtel and Moll. Lower Bed, rare. 



168. '^P. oblonga, Will. Lower Bed, rare. 



169. "^P. semiornata, sp. nov. PI. i., figs. 12« — c. Test subglo- 

 bular, more or less compressed on superior face ; periphery, obtuse 



