132 



vaulted scales. Interspaces flat, twice as wide as the ribSy. 

 traversed by curved imbricating lamellae. 



Interior unknown. 



Dimensions of Type. — Antero-posterior diameter 40, umbo- 

 ventral diameter 41; sectional diameter of united valves 25^ 

 millimeters. 



Locality. — Subcrystalline miocene limestone near Edithburg, 

 Yorke's Peninsula. 



Remark. — Whether the presence of a medio-sulcus in the ribs 

 can be ascribed t-o a primary characteristic of the mollusc or to- 

 a feature subsequently produced by fossilization remains to be 

 proved. 



Cardita dennanti (Tate and Basedow), spec. nov. PI. ii., fig. 4, 



Shell ovately triangular, transverse, inequilateral, modera^ 

 tely solid ; umbos prominent, obtuse, antemedian, incurved. 

 Post-dorsal margin inclined, antero-dorsal margin cordate. 



Surface ornamented with 23 mde truncated ribs (1 mm. wide 

 in medio-ventral area), which are plain and slightly margined 

 at the sides. The intervening flat furrows, narrower than the 

 ribs, are traversed by somewhat distant, transverse threads,, 

 which cross the ribs. 



Dimensions of Type. — Antero-posterior diameter 13 ; umbo- 

 ventral diameter 11 mm. 



Locality. — Subcrystalline miocene limestone near Edithburg. 

 Yorke's Peninsula. 



Imperfect specimens of this species have also been found in 

 the miocene limestone at Hallett's Cove. 



The species is named after J. Dennant, Esq., Camberwell, in 

 recognition of invaluable palseontological sei^ices rendered. 



Glycimeris subradians (Tate), spec. nov. 



This species is of same general outline as G. radians, Lk., but 

 differs by being flatter and having its radial ribs more acutely 

 elevated, the interspaces being as wide. The radial ornamen- 

 tation, moreover, is obsolete on the lateral slopes. 



Ijocality. — Common in the miocene limestone at Hallett'a^ 

 Cove ; also in the subcrystalline miocene limestone near Edith- 

 burg. 



DESCRIPTFON OF PLATE II. 



Figure 1. Campanile triseriah, spec. nov. 

 *' 2. Meretrix sphericvJa, spec. nov. 



" 3. Cardium mediosulcatum (Tate and Basedow), spec. nov. 

 " 4. Cardita Dennanti (Tate and Basedow), spec. nov. 

 (AH figures of natural size). 



