106 Proceedings of the Royal Society of Victoria. 



lip ; a distinctly defined posterior canal can be seen. Anterior 

 canal broad, but relatively shallow, the anterior extremity of the 

 outer lip usually falling short of the columellar extremity by 

 about seven to ten millimetres. 



Dimensions. — Length of shell, 118 mm.; breadth, 63 mm.; 

 length of aperture, 88 mm. ; breadth of aperture, 22 mm. ; 

 breadth of canal, 13 mm. ; greatest breadth of embryo, 9 mm. ; 

 the above dimensions refer to the type specimen, but much 

 larger examples have been obtained, as may be seen by the 

 following : — Length, 145 mm. ; breadth, 77 mm. ; length of 

 aperture, 108 mm. ; breadth of aperture, 30 mm. ; breadth of 

 canal, 20 mm.; greatest breadth of embryo, 10 mm., for the 

 loan of which I am indebted to Mr. W. H. Green. 



Locality. — Miocene beds of Muddy Creek, and of Grange Burn, 

 Western Victoria ; also from the Miocene deposits of Beaumaris 

 (Mr. J. A. Atkinson). 



Observations. — As indicated by the above dimensions, the type 

 is not the largest representative of the species, but is a somewhat 

 short, broad, and slightly more tumid form, with an abnormal 

 peculiarity about the aperture, which can be seen in the accom- 

 panying figure. After the shell had apparently assumed its 

 adult form and perfected its outer lip, for some reason or other 

 another growth of shell was commenced, leaving the thickened 

 lip behind as a varix, and though at present the edge of this 

 secondary growth is imperfect through fracture, apparently 

 before preservation, it projects beyond the original lip for about 

 twelve millimetres and is about two millimetres thick at its 

 strongest part, thinning a little antei'iorly. 



The species to which this shell bears the most striking gene- 

 ral resemblance is the living Voluta fulgetrum, Sowerby, of 

 South Australian waters, but from this it may be distinguished 

 by its embryonic characters, the embryo being larger, broader, 

 and obliquely enrolled, and hence the immersed apex is eccentric, 

 further by the absence of the shouldering of the body-whorl, by 

 its well thickened and reflected lip, and by the sutural and other 

 characters. 



In some respects the present species appears intermediate 

 between Voluta fulgetrum, Sowerby, and Voluta fusiformis, 

 Swainson, but it does not possess the small embryo and rela- 



