BY W. L. MAY. 45 



front, where it curves round to form a very strong, con- 

 spicuous plait, above which, and well separated, is another 

 very small retreating plait (in some specimens there is also 

 a minute third plait, invisible from a front view). Length 

 3.5, breadth 2.3 mill. 



Locality — Type from 100 fathoms, 7 miles east of Cape 

 Pillar, with others ; also from 40 fathoms off Schouten 

 Island, and 50 fathoms off Maria Island, many living. 

 This is very similar in general appearance to M. crat-er- 

 icula, Tate and May. It is, however, a broader shell, and 

 lacks the peculiar crat(^r-like summit which is so character- 

 istic of that species. 



MARGINELLA SCHOUTANICA, Sp. Nov. 

 PI. II., fig. 2. 



Shell small, somewhat elongated, with a distinct spire, 

 white, and shining, whorls three, spire bluntly rounded, 

 and bending slightly toward=i the right. Aperture 

 moderately open, widening a little towards the squared 

 front ; outer lip thickened, but with a sharp edge. Colum- 

 ella slightly excavate, bearing four prominent, strongly 

 ascending plications, which reach more than half way up 

 the aperture. Length 4., breadth 2.5 mill. 



Locality — Type from 40 fathoms, 3 miles east of Schou- 

 ten Island, with a number of others. It is with some 

 hesitation that I have described this shell, which has a 

 considerable resemblance to several othei"s. From M. 

 pygmaea, Sowb., it differs in being narrower, with the plica- 

 tions reaching much higher on the pillar; than M. trans- 

 lucida, Sowb., it hag a shorter spire, with a different aper- 

 tural front, and is much smaller. It may possibly be a 

 small form of M. olivella, Reeve, but there are considerable 

 differences. 



The great height reached by the plaits on the colum- 

 ella, the slightly nodding appearance of the spire, its small 

 size and con?tant form, may distinguish it. 



NATICA SCHOUTANICA, Sp. Nov. 



PI. II., fig. 3. 



Shell, small, depressed, solid, yellowish-white, irregu- 

 larlv netted, with broken zigzag lines of chestnut, which 

 are most distinct on the upper part of the whorl, which 



