Victoi-idii Murine Moll n sea. 69 



Obs. — At pri'seiit tliroe speriineiis i-epreseiit the species, one, pos- 

 «essiii;^- ail fxtra wlioil. attaining the diniensions of 2 iinn. It has 

 an ally in /i*. /</'/(ir(/>\ I'etterd, whieh species possesses closer spirals 

 xind is more acuminate in form. 



Type in Mr. C. J. Gabriel's collection. 



Rissoa bicolor', Petterd. (Plate VIII., Figs. 5 and 6). 



This sjtecies was described as being " without sculpture, "'i 

 This is correct as far as concerns the body whorls, but a microscopic 

 •examination shows that the two-whorled protoconch is minutely 

 granulated, these granules being symmetrically arranged in about 

 twelve spiral rows, which are more clearly defined on the second 

 whorl. The species also varies in size and outline, some being 

 •elongately pyramidal, as figured by Tate and May. 2 and others are 

 smaller and more tumid in the Avhorls, we therefore give a figure 

 of one of these, and a magnification of the embryo showing the 

 feature above described. 



Bullinella pygmaea, A. Adams; var. sculpta, var. nov. 

 (Plate VIIT., Fig. 7). 



Shell thin, small, white, semi translucent, sub-cylindrical, trun- 

 cated at the top. Sculpture — the whole surface is scored with 

 numerous, irregular, somewhat remote spiral furrows, and with 

 longitudinals of a similar character, but more frequent. The top is 

 narrower and margined with a slightly thickened radiatingly- 

 marked rim, within which is an infundibuliform perforation. 

 Aperture the full length of the shell, narrower above, and almost 

 half the width of the shell at the anterior end. Outer lip. thin, 

 sharp, nearly straight. A narrow, elongated, oblique pillar-lip 

 appears, behind which is an umbilical chink, into which the sculp- 

 ture is clearly traced. 



Dimensions of Type. — Length, 1.25; breadtli. .75 mm. 



Locality. — Dredged off Wilson's Promontory. 



Obit. — In the series of the variety studied variation existed. A general 

 consistency in contour prevailed which warranted a variety being 

 made, but with not sufficient distinction to rank it as more than 

 a variety of the variable B. pygmaea, A. Ad. 



Type in Mr. C. J. Gabriel's collection. 



1 Jour, of Conch., 1884, vol. iv., page 137. 



2 Proc. Linn. ,Soc. X.S.W., 19U1, vol. xxvi., page 391, pi. 2C, fip. 63. 



