Foss?/ FaiDia, Table Cape Beds, Tasmania. 103 



the penultimate whurl and the one preceding it are angulate or 

 keeled about their middle Hne, the posterior slope being faintly 

 Concave, while the anterior slope is flat or slightly convex, the 

 body-whorl is also shouldered, the aperture is narrower and less 

 effuse, and the outer lip is not so distinctly reflected. In the 

 main apparently similarly ornamented to the above on the earlier 

 spire-whorls, but the body-whorl shows below the shoulder about 

 eight or ten widely separated, obscure, very broad, and scarcely 

 raised spiral ridges or bands, one of the strongest being near the 

 anterior end of the whorl. The dimensions of a large example of 

 this variety are: length, 157 mm.; breadth, 58 mm.; length of 

 aperture, 90 mm. ; Ijreadth of aperture, 27 mm. It might be 

 further mentioned that some of the young examples show a few 

 widely separated spiral ridges about their periphery of a much 

 stronger character than the earlier spiral threads. These young 

 examples are also finely spirally threaded and grooved at their 

 anterior end. The present species is somewhat related to 

 V. viacroptera, McCoy, but it is a very much more slender and 

 flatter spired form, with a much smaller pullus, and no wing-like 

 extension of the outer lip, which only slightly ascends the penul- 

 timate whorl, and is thickened at its outer edge. It also shows 

 some relation to V. pellita, Johnston, but may be easily distin- 

 guished from that species by the smaller size of its pullus, its 

 slender, elongate, and flat-whorled spire, and by its large, broad, 

 and effuse aperture. Type in my own collection. 



38. Voluta alticostata, Tate. 



Id., Tate, Gast. IT., 1889, p. 122, pLv., tig. 7. 



Observations. — A very tine entire representative of this species 

 is in this collection, and as it has been compared with a perfect 

 example of my own from Muddy Creek, the type locality of the 

 species, there can be no doubt about its identity. However, as 

 it is very much larger than any hitherto recorded example of the 

 species, I think it well to record the dimensions, which are as 

 follows : — Length, 185 mm. ; breadth, 85 mm. ; length of aper- 

 ture, 110 mm. ; breadth of aperture, 45 mm. A very much 

 larger example of this species, being over a foot in length, is in 

 the Melbourne National Museum, where it is labelled, though, as 

 I think, erroneously, Vohifa hajniafordi, McCoy, and was obtained 



