Tertiary.-] PALEONTOLOGY OF VICTORIA. IMoUusca. 



geologist working in the Flemingtou beds might by vigilance 

 enable me to clear up. 



Excessively abundant in the hard ferruginous Lower Pliocene 

 sandstone of Flemiugton, north of Melboiu-ne. 



Explanation or Figdkes. 



Plate XXVI.— Fig. 3, gutta-percha cast showing spiral striivtion and longitudinal ridges 

 near lower or anterior part of whorls, natural size. Fig. 3a, portion of ditto, magnified, showing 

 the usual obliteration of the longitudinal ridges on the upper portion of whorls, with a ievr 

 extending from one suture to the other, like varices, all crossed by the fine spiral striae. Fig. 4, 

 gutta-percha cast, natural size, of another specimen, showing an unusually large number of the 

 vertical ridges traversing the whole of the whorls between the sutures. (Both these figures 

 show the flatness of the whorls.) Fig. 5, instructive specimen, showing the striation and a few 

 of the vari.\-like ridges on external surface of apical portion, and showing the corresponding 

 internal cast with rounded smooth whorls and the form of the cast of body whorl, with the 

 obscure longitudinal ridges and the short anterior canal in lower part, natural size. (The want 

 of parallelism of the last suture is produced by the ascending dilated edge of the outer lip.) 

 Fig. 6, gutta-percha cast of portion of surface of larger specimen, showing the longitudinal 

 and spiral markings and general flatness of the whorls on the surface, with the inconspicuous 

 suture. Fig. 7, ordinary appearance of the majority of specimens, showing internal casts, with 

 smooth very convex whorls, separated by deep divisions, and the form of the aperture with the 

 slight concavity below suture of body whorl indicative of a corresponding ridge on the interior 

 of the posterior part of the outer lip of the shell, and the spiral ridge on the anterior part 

 indicative of a corresponding canal on the interior of the anterior portion of the mouth of the 

 shell. Fig. 8, portion of largest specimen seen, internal cast, natural size. Fig. 8a, another 

 view of same specimen, showing the greatest length observed of the anterior canal. Fig. 9, 

 portion of specimen, with unusually large prominent few longitudinal ridges. 



Frederick McCoy. 



[29] 



