4^20 Chapman and Gabriel : 



Jboth in the Werrikooian (Upper Pliocene) and the underlying 

 JCalimnan (Lower Pliocene) in the Mallee Bores. 



The distribution of the living examples is Flinders and Western- 

 tport, Victoria. 



Distribution. — Bore 1, 215-244 feet. Bore 6, 114-150 feet. Bore 



10. 160-186 feet; 186-190 feet; 195-225 feet; 225-230 feet. Bore 



11, 197-199 feet. 



Genus TURBONILLA, Risso. 



TUHBONILLA WEEAHENSIS,' sp. HOV. (PI. XXVIll., FigS. 27(1, h). 



Description. — Shell turreted, moderately elongate. Holotype 

 ^vith eight flattened whorls and a heterostrophe apex; whorls 

 slightly concave below the sutures. Aperture subquadrate, lip 

 thin. Surface of shell with about 24 shallow, sinuate sulci on each 

 Avhorl. Sutures well marked. The shell-surface between the sulci 

 iinely striate, longitudinally. 



Dimensions. — Height of holotype. 7.25 mm. Greatest width, 

 :2.5 mm. 



Distrthiition.—^ovQ 10. 225-230 feet; 310-320 feet. 



Fam. CAPULIDAE. 



Genus CALYPTRAEA. Lamarck. 



Calyptkaea KALiMNAE, sp. nov. (PI. XXVIII., FigS. 28a-c, 29). 



Description. — Shell of thick substance, sub-circular in basal out- 

 line. Spire excentric; apex slightly exsert. Sutures well marked, 

 whorls slightly to gently convex, marked by growth lines, corruga- 

 tions and striae, except on the first two whorls, which are smooth. 

 Base marked by sinuous growth-lines. Umbilical region with a 

 ■callus and very small perforation. 



Dimensions. — Major diameter of holotype (from Dennant coll.), 

 10 mm. Height, 6.5 mm. Diameter of a typical specimen from 

 the Mallee Bore, 4 mm. 



Observations. — The above species is represented by a large num- 

 ber of immature examples in the Mallee bores. They all occur on 

 the Kalimnan horizon. Since they are undeveloped specimens it 

 has been considered necessary to select as a holotype of the species 

 a fine example from the Dennant collection (lal>elled Calyptraea 

 «p.) from the Gippsland Lakes. 



1. Name derived from Co. Weeah in which the bores are situated. 



