13 



Dimensions. — The largest specimen is not perfect, but attained at 

 least to the following dimensions : length 21 mm. ; breadth 12 mai. 

 Form, and Loc. — Eocene : Muddy Creek, Victoria. 



G. 4171. Tour specimens. Presented lij John Demiant, Esq. 



Family BTJLLID^. 



Genus BULLA, Linnseus. 

 [Syst. Nat. ed. 10, vol. i. 1758, p. 725.] 



Bulla australis, Gray. 



1825. Bulla austrnlis, Gray, Ann. Phil. vol. xxv. p. 408. 



1850. Bulla oblonga, A. Adams, Thes. Conch, vol. ii. p. 577, pi. cxxiii. fig. 74. 



Two fragments, and an internal cast, referable apparently to 

 this species, are in the Museum collection. One is rather more 

 cylindrical than the typical form of the species, but is too imperfect 

 for description. 



Dimensions. — Length 53 mm. ; breadth 32 mm. 



Form, and Loc. — Post-Pliocene (?) : South and "West Australia. 



97721. Two specimens, from Logues, Champion Bay, "Western 

 Australia. 



Presented hij R. Ether idge, E'^q., jun., and R. Y. L. Brown, Esq. 



42691. An internal compressed cast, from "Tertiary beds," 

 South Australia. Presented ly the Governors of Adelaide Museum. 



Genus BTJLLINELLA, U. B. Newton. 



[Syst. List Edwards Coll. B.M. 1891, p. 265.] 



BulUna, Risso, Hist. Nat. Eur. Merid. t. iv. 1826, p. 51 



[non Ferussac, 1822). 

 Cylichna, Loren, Ofv. K. Vet. Akad. Forhandl. 1847, p. 142 



{tion Burmeister, 1844). 



Form cylindrical ; spire deeply perforated at the summit ; last 

 whorl covering all the others ; surface generally ornamented by 

 spiral striaj especially marked at the anterior portion of the whorl ; 



