On some New Species of Victorian MoUusca, 181 



Anterior end of aperture furnished on the coluniellar side 

 with two oblique plaits, the one forming the anterior end of the 

 columella being the strongest and most obliquely twisted. 



Outer lip thin and smooth within. 



Dimensions. — Length, 1-5 mm. ; breadth, 1 mm. 



Locality. — Shoreham beach, Western Port Bay. 



Observations. — -This species is very similar in gener-al habit to 

 Marginella (Persicula) nympha. Brazier, described from Watson 

 Bay, Sydney ; but, apart from other differences, attention may 

 be particularly drawn to the distinct columellar folds and the 

 thickened and denticulate outer lip. 



Ancilla edithse, n. sp. (PI. XX., Fig. 5.) 



Shell acuminately, elongately fusiform ; fairly solid ; of 7 

 whorls, including 2 nuclear ; from the dorsal aspect the body 

 whorl constitutes rather more than half of the entire length, and 

 is very finely longitudinally and spirally striate. 



Columellar callosity starting from a little below the centre of 

 the aperture, and extending across the body and penultimate 

 whorls ; well defined, but not conspicuously prominent, it has a 

 peculiarly finely corroded appearance. 



An enamel band starts below the suture of the body whorl, 

 and continues over the spire in a less pronounced manner. 

 There are about five distinct, slightly punctured, encircling 

 grooves on the penultimate and spiral whorls. 



The uppermost basal groove commences at the columellar 

 callosity, a little below the centre of the body whorl, and 

 terminates in a very slight projection of the outer lip ; after an 

 interval this groove is followed by a second similar one, which 

 has no projection on the lip, and terminates there a little above 

 the notch ; this groove is followed by a well defined ridge, which 

 is somewhat concave at the lip ; this is caused by the backward 

 effuseness of the notch ; then follow about six ridges crossing 

 the arcuately twisted columella, the uppermost ridge terminating 

 about the centre of the notch. 



Aperture narrow lanceolate ; outer lip acute, with a well 

 defined sinus at its junction with the body whorl. 



The shell is creamy white, with a brown band immediately 

 above the upper basal groove ; sometimes the coloration is 



