AiiT. XIII. — On Some New Species of Victorian Molliisca. 



By G. B. PRITCHARD axd J. H. GATLIFR 



(With Plate XX.) 

 [Read 8th December, 1898.] 



Mapginelia halli, sp. nov. (PL XX., Fig. 1). 



Description. — Shell minute, somewhat tumidly ovate, white or 

 sordid white in colour, of a relatively thick and solid build, and 

 with a totally immersed spire. Aperture length gives nearly the 

 greatest length of the shell on account of the ascending character 

 of tlie outer lip, which reaches close to the axis of enrolment of 

 the shell. 



Outer lip thickened, smooth within, the thickening being 

 continuous to the rather well marked enamelled pad of the inner 

 lip at the posterior end, while at the anterior end it is continuous 

 to the anterior columella plait. 



Imier lip with a distinctly thickened enamel, and bearing 

 anteriorly seven plaits, the three lower ones being most strongly 

 developed, with occasionally a faint development of a slight 

 intermediate ridge between the third and fourth and between the 

 fourth and fifth. 



Dimensions. — Length 2 mm.; breadth, 1-5 mm. 



Locality. — Shoreham Beach, Western Port Bay. 



Observations. — This species is named after Mr. T. S. Hall, 

 M.A., who has rendered us much assistance in supplying accurate 

 drawings of some of the species herein considered. 



Mapginelia shorehami, sp. nov. (PL XX., Fig. 2). 



Description. — Shell minute, ovate, translucent- white, smooth, 

 with a short, obtuse, but distinctly developed spire consisting of 

 about two to three whorls, and a somewhat regularly convex 

 body-whorl, which bears very fine and regular milky-white 

 markings parallel to the lines of growth, being just visible under 

 a pocket lens. 



