BY W. L. MA.Y. 59 



This is very close to M . angasi, Crosse, of which it may- 

 be a variant. It is more broadly shouldered, with a larger 

 aperture, and has the toothed outer lip. 



PL XIV., fig. 6. 



Maeginella biultidentata, sp. nov, 



Shell small, white, broadly-ovate, spire hidden, aper- 

 ture rather wide. Columella convex, bearing about nine 

 main plications, of which the anterior three are the 

 strongest; there are several small subsidiary teeth between 

 the upper ones. Outer lip rises above the summit; is 

 sti'ongiy thickened and armed inside with about ten minute 

 denticles. 



Length, 1.5; breadth, 1.2 mill. 



Type, with three others from about ten fathoms, be- 

 tween Gordon and South Bruny, D'Entrecasteaux 

 Channel. 



This species is nearest related to M. tlioulnen^i?, May; 

 it differs in being shorter and broader, having a wider 

 aperture, stronger dentition, and the crenated outer lip. 

 The small intercalated teeth have not been noticed in any 

 other Tasmania!! Marginella. 



PL XIV., fig. 7. 



Marginella inceeta, sp. nov. 



Shell minute, smooth, white, opaque, ovate; sjoire 

 small but distinct, of two' whorls. Aperture narrow above, 

 almost linear for half its length, then widening to the 

 rounded front. Outer lip moderately thickened, slightly 

 curved, smoo'th within. Columella convexly rounded, with 

 two distinct plaits, rather near together, of which the 

 anterior is the stronger. 



Length, 2; breadth, 1.6 mm. 



Type, with five others, from about 40 fathoms off 

 Thouin Bay. This species closely resembles M. freycinefi, 

 May, in size and shape; it has more spire, is bro^ader, with 

 a more curved columella, arid only two plaits. 



PL XIV., fig. 8.' 



Iredale in Trans. N.Z. Inst, for 1914, p. 457, pro- 

 jDoeed a new genus Estea for a Rissoid group, and men- 

 tions Eissoa colli mnaria, Hedley and May, as a good repre- 

 sentative. We have a large number of species, which seem 

 to fall naturallv into Iredale's genus. There are some 

 seventeen Tasmanian named species, and others not yet 



