Fossil Fauna, Tabic Cape Beds, Tasmania. 123 



ternally and probably thin at the outer edge ; inner lip thin, 

 slightly reflected towards the umbilicus and regularly concavely 

 arched to the anterior canal, the latter being well-defined. Um- 

 bilicus very broad and deep, being a little broader than the 

 aperture, and passing up more than half the height of the shell, 

 strongly margined by a well-elevated ridge passing from the end 

 of the anterior canal to a point a little below the suture of the 

 body-whorl. Internally the umbilicus is finely striate and strongly 

 angled by a revolving ridge, which starts from about the middle 

 of the aperture, and a little highei- up by another similar though 

 very much fainter ridge. 



Ornament consists first of the strong keel at the periphery of 

 the body-whorl, but usually in juxtaposition to the antei-ior suture 

 of the earlier whorls. This keel carries numerous erect, forwardly 

 projecting spinose scales, which number about fifteen on the 

 body-whorl. On the convex slope between the keel and the 

 suture there ai-e three unecjually sized spiral bands of granules, 

 the posterior band l)eing made up of the coarsest granules. On 

 the base between the keel and the thread margining the umbi- 

 licus is one prominent squamose spiral ridge with a much finer 

 squamose thread on either side. Further, the shell is finely 

 lamellosely-striate transversely. 



Dimensions. — Length, 7 mm. ; breadth, 8 nun. ; lireadth f»f 

 aperture, 3 mm. 



Observations. — After due consideration I ha\e come to the 

 conclusion that the shell I have described above is identical with 

 that described by the late Rev. J. E. T. AVoods under the name 

 of Solarium {Torinia) gidlmloides, but as some of the features of 

 the species have not already been very fully expressed, I take the 

 opportunity of adding the above particulai-s in the hope that it 

 may render its future identification less difiicult. With regard 

 to the generic location I prefer to place it under Delphinula as 

 above, as its characters seem to point more clearly in that direc- 

 tion. In the original description it is stated that the shell is 

 "conspicuously keeled, keel thin, finely granular, with irregular 

 lines of rather larger granules above it." The herein-described 

 form has very distinct forwardly -projecting scales on the keel and 

 also on the succeeding ridge on the base, but not so prominent on 

 the latter. These might, howevei-, easily become worn or broken 



