122 Proceedings of the Royal Society of Victoria. 



on either side of it. On the convex base of the Ijody-whoi'l 

 there is a fourth granulose ridge slightly finer than the third, 

 and situated midway between it and the one margining the 

 umbilicus, and on either side of this ridge there are three spiral 

 threads, the middle one being the strongest, though only faintly 

 granulose. The whole surface finely obliquely striate, the strife 

 being pax'allel to the outer margin of the aperture or to the lines 

 of growth. Umbilicus with two faint spirally-angulose ridges 

 and a few obscure intercalated threads and fine striae parallel to 

 the inner lip. 



Dimeiisiofis. — Ijength, 8 mm. ; breadth, 8 mm. ; breadth of 

 aperture, 3 mm. ; length from suture to end of anterior canal, 

 5 mm. 



Locality. — Eocene beds of Taljle Cape, Tasmania. 



Observations. — At first I thought that this might possibly be 

 D. tetragonostoma, T. Woods, but after careful consideration I 

 have been unable to make it agree with the description of that 

 species, the ornament particularly being markedly diverse from 

 that expi'essed by the late Rev. J. E. T. Woods. The present 

 species is, further, a much larger shell, though it is possible from 

 the dimensions given of D. tetragonostoma that the latter species 

 may have been founded on an immature shell. D. tetragonostoma 

 is also stated to have some relation with the latticed Tasmanian 

 Liotias, whereas the present form does not appear to me to show 

 any such special resemblance. 



86. Delphinula gibbuloides, T. Woods. 



Solarium {Torinia) gilluiloides, T. Woods, P.R.S.Tas., 1876, 

 pp. 97, 98. 



Shell small, somewhat thick, broadly turbinate, somewhat de- 

 pressed, with an obtuse apex, very large body-whorl, and a Ijroad 

 and deeply excavated umbilicus. 



Apical angle about ninety degrees. Embryo obtuse, turbinate, 

 consisting of about one-and-a-half smooth whorls, the second of 

 which is slightly angulated. Spire-whorls three, flatly convex, with 

 a deeply impressed suture between the earlier whorls, becoming 

 less defined anteriorly. Body-whorl strongly keeled at the peri- 

 phery, base convex to the well-elevated ridge margining the 

 umbilicus. Aperture round ; outer lip incomplete, smooth in- 



