96 



of three very small depressed whorls ; body whorl distinctly striated 

 with lines of growth ; mouth narrow, subsigrnoid ; columella with eight 

 plaits, the anterior valid scarcely oblique, the posterior four faintly 

 traceable, outer lip much thickened, and very regularly dentate with 12 

 raised linear teeth : at the base of the columella there is a distinct varii, 

 which proceeding round the posterior end of the shell unites with the 

 reflected lip, making that broadly marginal. It bridges over the gap 

 between Marginella and Erato and Cgpraea. Marginella 5-plicata, 

 Lam., M.elegans (Gmel.) and M. turbinata (Sow.) show an approach to 

 this form, but they are larger shells." 



Unacquainted with the species I cannot pronounce upon its generic 

 affinities, but from its diagnosis it would appear to be rather an Erato 

 than a Marginella, 



Horizon and Locality. -Miocene ; Table Cape, Tasmania {Johnston.) 



17. — Erato Australis (new species). 



Shell minute, shining, horn-colour ; tringularly pear-shaped ; 

 spire rather exserted somewhat acutely conical ; whorl 4£, 

 body whorl marked with lines of growth, rotundately angled over the 

 suture, and constrictedly attenuated in front; outer lip moderately 

 thickened and inflected, inner margin denticulated ; aperture moderately 

 wide, enlarged behind and narrowing to the front ; columella with four 

 slender oblique plaits succeeded by denticles. Length, 0.28 ; breadth. 

 0.15 inch. 



E. Australia is seemingly related to the above, but separalle by its 

 exserted spire, in which character it agrees with E. gallinacea, Rv. from 

 the Philippines, and E. callosa, (Adams and Rv.) from the Chinese Seas, 

 differing from them in its narrower shape, and less inflated body 

 whorl. 



Locality and Horizon. — Eocene marls at Blanche Point, Aldinga 

 South Australia {Tate), fifteen examples. 



18. — Erato minor (new species). 

 Shell minute, somewhat elongately pyriform, orange yellow, 

 spire short obtuse; outer lip shining white, with a broad callous 

 expansion posteriorly, extending over the penultimate whorl and 

 enveloping the base of the shell ; columella with five conspicuous plaits 

 and denticles. Resembles the living E. t'andwicensis, (Pease,) but the 

 aperture is not so prolonged posteriorly, and the spire is much shorter 

 Dimensions. — Length - 15, breadth 0.1 inch. 



