New Species of Victorian Mollusca. 137 



sure that our shell is necessarily the same as that in the British 

 Museum, we have named it as above. 



Type in G. B. Pritehard's private collection, 



Stylifep immaculata, sp. nov. (PI. XXI., Fig. 2.) 



Shell small, pyramidal, consisting of about five and a half 

 whorls, with a fairly well marked though small styliform apex. 



The apex and spire whorls, with the exception of the penulti- 

 mate, are of an opaque milky white colour, but the penultimate 

 and body whorls are translucent and hyaline. 



The whole shell is perfectly smooth and highly lustrous ; the 

 whorls are only very slightly convex, and the suture is not deeply 

 impressed, the body-whorl is subangulate at the periphery and 

 rapidly sloping to the base. 



Aperture ovate, slightly effuse anteriorly ; inner lip a little 

 thickened, outer lip strong, also a little thickened, but thin at the 

 edge, with a strong forwardly arching margin between the base 

 and the posterior suture, the maximum protrusion being medial, 

 or a little nearer the anterior end. 



Dimensions. — Length, 3 mm., nearly ; breadth, 1-5 mm. ; length 

 of aperture slightly over 1 mm. ; breadth of aperture, "75 mm. 



Locality. — Shoreham, Western Port. 



Observations. — This species is distinctly an adult form, and 

 though of such small size, all its characters appear well matured, 

 so that the above remarks and accompanying figure should enable 

 it to be easily identified. We are not at present aware of any 

 sufficiently closely related species to necessitate a comparison. 



Type in Mr. Gatliff's collection. 



Marginella whani, sp. nov. (PI. XXL, Figs. 5, 6.) 



Description. — Shell cylindrical, smooth, fairly solid, spire im- 

 mersed. Opaque white. Aperture long, narrow, widening 

 anteriorly, continues to the apex of the body whorl. Outer lip 

 thickened, not dentate within ; this thickening, which has a dis- 

 tinct porcellanous appearance, continues anteriorly to the 

 columella, a little above the plaits, it also continues well defined 

 over the apex on to the columella, which bears anteriorly three 

 strong and well defined obliquely ascending plaits. 



