'98 Proceedings of the Royal Society of Victoria. 



Dimensions. — Antero-posterior diameter, 19 mm.; greatest 

 "■breadth, 12'5 mm.; umbo-veiitral diameter, 11 luui. ; thickness 

 'through one valve, about 4 mm. 



Locality. — Jimmy's Point, Kalimna, Gippsland Lakes. 

 Kalimnan, — Miocene. 



Capdita excrescens, sp. nov. (PI. XII., Figs. 2, 3). 



Description. — Shell large, thick and strong, rotund, with a 

 'remarkably prominent umbonal region, and bearing coarse radial 

 ■ costae, which are granulosely ornate. 



Anterior side extremely short, slightly concave anterior to the 

 umbo, with a i-elatively small lunule; post dorsal slope long and 

 .faintly convex, remainder of the margin regularly I'ounded. 

 Umbo strong and incurved anteriorly, and rising high so as to 

 give a strong hump to the shell. 



Surface sculptured by 19 strong radial ribs, with broader 

 interspaces, except at the ventral margin; both ribs and inter- 

 : spaces increasing in breadth towards the ventral margin; at the 

 medial portion of the ventral margin the distance from centre to 



• centre of two adjoining ribs being (2^ two millimetres; the ribs 

 bear a rather strong beading, the beads are irregularly sized, 

 but run about eight in 5 millimetres, becoming more crowded 

 anteriorly, towards the ventral margin for about the last 5 

 millimetres the beads are replaced by closer imbricating frills. 



•Concentric lamellae show in the interspaces corresponding to the 

 lines of growth, most prominently seen towards the anterior and 



(posterior portions of the shell. Inner margin undulatory and 



• coarsely denticulate, the teeth corresponding to the interspaces. 



Dimensions. — Antero-posterior diameter, 21 mm.; umbo- 

 ventral diameter, 22 mm.; thickness through one valve, about 

 9 mm. 



Locality. — Shores of Lake Bullen Merri, near Camperdown. 

 Balcombian, — Eocene. 



Lucina gunyoungensis, sp. nov. (PI. XIV., Fig. 13). 



Description.— 'Ji\\^\\ small, thin, orbicular to quadrately 

 •orbiculai', somewhat depressed, with a prominent pointed beak, 

 -greatest convexity of shell in the umbonal half, thence venti-ally 

 trather flattened. 



