LOTORirir. 189 



Dimensions. — Length 52 mm. ; breadth 28 mm. ; length of 

 aperture I6mm. ; h-ngth of canal 14 mm. 

 Form, and Loc. — Eocene : Victoria. 



G. 352. A specimen in which the anterior spiral ornament is 

 abnormally granulose ; from Bairnsdale. 



Presented hy H. W. Grigson, JEsq. 



G. 4265. Example of the adult ; from Muddy Creek. 



Presented hy John Lennant, Esq. 



G. 4272. A young specimen, in which the whorls are not 

 as convex and tuberculose as the type, whilst the shell is more 

 solid; from Muddy Creek. Presented by John Dennant, Esq. 



G. 5513. Example of the adult, having a very thin outer 

 margin and sharply bent canal ; from Muddy Creek. Purchased. 



G. 9398. A series exhibiting stages of growth of the young ; 

 from Muddy Creek. Purchased. 



Lotorium gibbum, Tate (sp.). 



1888. Triton gihbio,, Tate, Trans. Eoy. Soc. South Aust. vol. s. p 118 

 pi. V. fig. 9. ' 



Shell remarkably distorted, of the same group as Z. cyphus; 

 it is distinguished by its gibbose whorls, which are much com- 

 pressed and angulated at the periphery, where immense projecting, 

 acute, flattened serrations are developed; the other ornament of 

 the whorls consists of undulating spiral lineations, crossed by fine 

 hues of growth; varices prominent, about three in every two 

 whorls in the adult ; aperture broad, ovate ; outer margin slightly 

 reflected, dentate within, denticles being mostly developed near 

 the entrance to the canal; inner margin smooth, plated, and 

 granulate; columella excavated, twisted in front, umbHicate ; 

 canal long, bent, and narrow. 



Dimensions. —l^tm^ih 31mm.; breadth 19 mm. ; length of 

 aperture 11mm. ; length of canal 9 mm. 



Form, and Zoc— Eocene : Victoria. 



