91 



Locality and Horizon. — Eocene marls, Blanche Point, Aldinga, South 

 Australia, {Tate) many examples. 



2. — Marginelea Cassidifobmis (new species). 



Shell small, rather solid, cream-coloured, shining; ventricose- 

 shaped like a typical Cassis, ornamented with plications on the 

 shoulder of the whorl, fourteen on the last whorl. Aperture narrow 

 oblong ; outer lip straight, thick, and channelled above ; columella quadri- 

 plicate, the anterior two oblique, the other two transverse. Dimensions : 

 — Length, *18 ; breadth, -14. 



Differs markedly from M. Aldingce in shape and form of aperture, 

 &c. 



Locality and Horizon. — Miocene, Muddy Creek, near Hamilton, 



Victoria {Tate, 4 exs). 



3. — Marginelea muscarioides (new species). 



Shell small, volutiform, shining cream-coloured, and obscurely 

 marked with several narrow longtitudinal bands of dark colour. 

 Spire conspicuously exserted ; whorls regularly convex, last whorl 

 gibbous slightly angled over the suture, transversely striated, and in 

 some examples obscurely plicated at the angle. Aperture wide, curved 

 posteriorly, and dilated anteriorly ; outer lip moderately thickened, 

 ivory white, smooth, and strongly channelled above, not extending on to 

 the penultimate whorl. Columella with four strong plaits. Dimensions : 

 —Length 0275, breadth 0-15 



This species is a diminutive M. muscaria, Lamk., from which it 

 differs in certain minute but constant details. 



In M. muscaria the callous lip is proportionately thicker, and ill- 

 defined above, but a more particular difference is its extension on to the 

 penultimate whorl, thence spreading over the base of the shell and giving 

 rise to a flattened appearance varicosely margined on the left side. The 

 under side of M. muscarioides is regularly convex, and the posterior 

 angle of the aperture is squarish. 



Locality and Horizon. — Miocene, Muddy Creek, Victoria, {Tate) 

 many examples. 



4. — Marginella hordeacea (new species). 



Shell small, broadly ovate ; spire short obtuse ; last whorl 

 regularly convex above, slightly depressed on the under side. Outer lip 

 very thick and strongly channelled above, inner edge smooth ; columella 



