274 



nacreous callus ; columellar area smooth, broad, excavated, 

 concave ; imperforate. 



This species, not having been figured by the author, is now 

 drawn on Plate VIII. Pigs. 2ar-h. 



Dimensions. — Length 13 mm.; breadth 10-5 mm. ; length of 

 aperture 7 mm. 



Form, and Loc. — Eocene : Table Cape, Tasmania. 



83994. An example of the ephebic stage of growth. Purchased. 



Turbo hamiltonensis, sp. nov. 



[Plate VIII. Figs. Zor-c.^ 



Shell turbinate -conical, imperforate; spire elevated, whorls 

 five in number, convex ; ornament consisting of subgranulate 

 spiral carinse causing angulations at the periphery, these are two 

 iu number on the spire-whorls and three on the last whorl ; 

 between them are developed minor spiral granulose lineations ; 

 the sloping area between the posterior carina and the deeply 

 incised suture has three rows of small spiral granulations, and 

 a fourth, larger than the others, bordering the suture ; the 

 flattened base of the shell between the anterior of the three 

 carinas and the columellar region bears a fourth carina with more 

 distinct granulations than the others, and other rows of spiral 

 granules , eight in number, in the type specimen ; there is a spiral 

 depression bordering the columella ; aperture circular, entire ; 

 outer margin thin ; inner margin excavated, slightly callous ; 

 columellar region broad, with two or three irregular, small 

 granules in front. 



This species differs from T. etheridgei, amongst other things, in 

 having a much broader columellar area, by the spiral depression 

 at the base, in having relatively broader whorls, the deeply 

 incised suture, the angulations of the periphery, and by the 

 granulate ornament being difi'erently disposed. 



Dimensions. — Length 14 mm.; breadth 13-5 mm.; length of 

 aperture 7 mm. 



Form, and Loc. — Eocene (?) : Muddy Creek, Victoria. 



G. 4299. The type specimen. Presented by Johi Dennant, Esq. 



i 



