Nev: S])ecies of Vicioi-'ian MoUusca. 189 



shell. Sutures impressed. If microscopically and transparently 

 viewed, faint irregular ridges will be seen to encircle the whorls 

 crossed by feeble lines of growth. Aperture about half the 

 length of shell, ovate, rounded anteriorly. Peristome thin, 

 entire, innei- lip slightly reflected, behind which appears a slight 

 umbilical chink. 



Dimensions of Tyjy^. — Length, 2 ; breadth, 1 mm. 



LocaUty. — Ocean beach, near Point Nepean. 



Ohs. — A small, transparent, rissoa-like shell. The specimens 

 show variation, one being slightly larger than the type, its 

 much rounder body-whorl comprising about four-fifths of the 

 shell. Very few species of genus Je-ffreysui exist, and it is 

 interesting to note its occurrence in Australian waters, where, 

 as far as we know, the present is the first record. This genus 

 was placed by Alder in the family Littorinidae. Named in 

 honour of the author's son. Wilfred E. Gatlifl. 



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



Lucina mayi, sp. nov. (PI. XLVIL, Figs. 8-12). 



Shell creamy-white, flatly convex, subequilateral. Beaks small, 

 acute, slightly elevated. Lunule elongate and well defined. 

 Escutcheon long and narrow, impressed. Sculpture of fine, 

 sharp, concentric lamellae, with much wider interspaces, which 

 become closer as they approach the ventral margin. Radial 

 sculpture comprising irregular riblets, plainly seen under the 

 lens, which traverse the concentric interspaces. Both valves 

 present these features. On the right valve a shallow flexuosity 

 is observed at the posterior dorsal area. The concentric lamel- 

 lae continue to the post-dorsal margin. Hinge normal, mus- 

 cular impressions well defined, with the pallial line easily 

 discernible. 



Dimensions of Type. — Length, 9 ; breadth, 8 : depth of single 

 valve, L75 mm. 



LocaUty. — Dredged off' Point Cook, Port Phillip, about eight 

 fathoms. 



Ohs. — The species has not been obtained by us in pairs, oppo- 

 site valves of similar dimensions being selected as the type. It 

 has an ally in L. hrazieri, Sow., from which it differs in the 



