KINGICULA. 15 



The specimens in the Museum are larger than the average of 

 the living B. arachis ; also, they are relatively broader in pro- 

 portion to their length and are not quite as cylindrical. In 

 all other characters, however, they are essentially similar, and the 

 differences indicated merely constitute a local variation of the 

 species. 



Dimensions. — Length 22 mm. ; breadth 10 mm. 



Form, and Loc. — Post-Pliocene : Limestone Creek, Glenelg 

 river, Victoria. 



G. 5579- Two specimens. Purchased. 



Bullinella, sp. 



A mutilated cast of what is evidently a very large example 

 of this genus, probably allied specifically to B. arachis, forms 

 part of the Museum collection. It is cylindrical, the sides being 

 remarkably parallel to each other ; the apical perforation is 

 relatively small, and there is a trace of a prominent denticle 

 on the anterior portion of the columella. 



Ditiioisions. — Length 30 mm.; breadth 15 mm. 



Form, and Loc. — "Tertiary" : Null arbor Plains, South Australia. 



G. 9303. Internal cast, mutilated. H. Y. L. Brown Coll. 



Family RITs^GICULIDiE. 



Genus RINGICULA, Deshayes. 



[Hist. Nat. Anim. sans Vert. t. viii. ed. 2, 1838, p. 342.] 



Shell small, mamillated protoconch ; aperture canaliculated 

 posteriorly, excavated anteriorly ; outer margin usually very 

 thick, occasionally denticulated within ; columellar border thick 

 and callous, the callus extending from the anterior extremity to 

 the posterior canaliculation ; columella arched and furnished with 

 from two to four plications. M. Morlet has grouped ' the species 



' Journ. de Conchyl. 3^ ser. t. xviii. 1878, p. 113 et sqq. ; id. 3^ ser. t. xx. 

 1880, p. 150 ; id. 3^ ser. t. xxii. 1882, p. 2U0. 



