EEATO. 215 



Erato minor, Tate. 



1878. Erato minor, Tate, Trans. Phil. Soc. Adelaide, p. 96. 



1S90 



£ra(o minor, Tate, Truna. Eoy. Soc. South Aust. vol siii nt 2 

 p. 215. ■ ^ ■ ' 



1892. i:rato minor, Tate, id. vol. xiii. supp. pi. xiii. figs. 10, 10a. 



1895 



£ralo minor, Tate and Dennant, id. vol. xix. pt. 1, p. 111. 

 1896. Erato minor (?), Pritchard, Proc. Eoy. Soc. Vict. vol. viii. n.s. p. 146. 



Shell small, pyriform, tumid, abruptly contracted, and slightly 

 reverted in front; spire very short, later whorls partially envefoped 

 by the callosity extending from the thick, dentate, outer margia, 

 and covering a large portion of the ventral surface of the shell • 

 aperture narrow, broadening posteriorly, notched in front \ 

 columella finely plicate anteriorly, where it is also spirally ridged! 



It is broader than E. lavis, Donovan, of the Upper Tertiary and 

 recent seas of Europe, with which it has considerable analogy, and 

 its columella is more saliently and numerously plicated. 



Dimensions.— Langth. 4: m\n.; breadth 2-75 mm. 



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



G. 9475. Several examples of the adult. Purchased. 



Erato australis, Tate. 



1878. Erato australis, Tate, Trans. Phil. Soc. Adelaide, p. 96. 

 1890. Erato australis, Tate, Trans. Eoy. Soc. South Aust. vol. xiii pt 2 

 p. 216. ' 



1892. Erato australis, Tate, id. vol. xiii. supp. pi. xiii. fio-. 9. 



1893. Erato australis, Tate and Dennant, id. vol. xvii. pt. 1, p. 222. 

 1895. Erato australis, Tate and Dennant, id. vol. xis. pt. 1, p. 111. 



Distinguished from K minor in being ovately fusiform instead 

 of pyriform, but especially in having a much elevated spire and 

 less callosity. The outer margin is moderately thickened, and 

 the shelly deposit extends to the penultimate whorl, being 

 dentated at the inner edge of the aperture ; columella with four 

 thread-like plications with a few denticles behind, though these 

 latter are not always developed. 



Dimensions.— Length. 6-5 mm. ; breadth 3-75 mm. 



Form, and Zoc— Eocene : Spring Creek, Victoria. 



G. 9472. Three examples of the neanic stage of growth. 



Furchased. 



