110 Proceedinr/s of the Royal Sociefij of Victoria. 



Succeedin;^ whorls foui', the earlier being almost flat, becoming 

 slightly convex, the convexity being most marked where the 

 slight costse are developed. The costje consist of slight narrow 

 raised undulations with broad shallow interspaces, the costfe 

 being most prominent about the middle of the whorl, fading out 

 before reaching the posterior suture but reaching to the anterior 

 suture, while on the body whorl they soon thin out on the 

 anterior slope. The costie number about twelve posteriorly 

 whilst on the body whorl they show a tendency to become 

 obsolete, about ten can usually be counted. Parallel to the 

 costaj there are somewhat coarse lines of growth, and transverse 

 to them spiral threads are distinct on the posterior whorls, but 

 gradually fade out towards the body-whorl where they can only 

 be seen on the upper portion of whorl down to the gradually 

 sloping shoulder. 



Aperture narrow elongate, columella slightly twisted and 

 bearing four strong oblique plaits. Outer lip thin and sharp at 

 the edge, not ascending the penultimate whorl. Canal broad 

 a,nd deep. 



Dimensions. — Length of shell, 55 mm.; breadth of shell, 19 mu).; 

 length of aperture, 32 mm.; breadth of aperture, 6 mm. 



Locality. — Lower horizon of the Eocene beds of Spring Creek, 

 south of Geelong. 



Observations. — In some examples of this species the costal are 

 somewhat more marked tlian in the figured specimen, and are in 

 the form of acute narrow and more elevated ridges. This species 

 is most closely allied to Voluta sarissa, Tate, which may possibly 

 account for the record of that species in these beds.^ The present 

 species may however be readily distinguished from Voluta sarissa, 

 Tate, in general habit, by its short spire, its very distinct 

 embryo, several points in its ornament, and general proportions. 



All the types of the herein described species are in my own 

 collection. 



In conclusion I beg to convey my best thanks to Mr. T. S. 

 Hall, M.A., for the time and care he has been good enough to 

 bestow on the drawings of these shells, for the value of the 

 present paper is much enhanced by the accompanying plates 

 from his drawings. 



1 Trans. Roy. Soc. S.A., 1S93, p. -ItQ. 



