274 
L. crebresquamata, spec. nov. 
Shell considerably inflated with a prominent umbo which 
arches over the hinge-line. Hinge-line straight, narrow, the 
shell widening thence to about two-thirds of the total length, 
thence slightly narrowing to the arched front. 
Radial ribs about 50, subacute, beset with suberect squame 
which are sometimes denticuliform ; they extend down the sides 
of the ribs, but do not cross the furrows ; the squame are close- 
set, and often subimbricate. The furrows are not so wide as the 
ribs, and appear to be inornate. 
Dimensions.—Umbo-ventral diameter, 12; antero-posterior 
diameter, 8; length of hinge-line, 4; thickness through both 
valves, 10 mm. 
Post-EocENE.—Spring Creek, Vict. (three examples). 
Genus Limes, Brown, 1831. 
L. alticostata, Tate, 1, p. 119. 
Eocrene.—Adelaide-bore. 
L. transenna, Tate, 1, p. 119; id. Harris, &, p. 313. 
Kocene.—Mount Gambier, 8.A.; Bellarine Pen. (Hall and 
Pritchard), Muddy Creek, Mornington, and Shelford (Victoria). 
Post-Eocrene.—Table Cape, Tasmania. 
L. multiradiata, spec. nov. 
Shell moderately inflated with a pointed central umbo ; 
subinequilateral, the umbo-ventral axis slightly oblique; wings 
slightly developed. The surface of the valves ornamented with 
numerous flatly-rounded smooth ribs (about ten to one mm. of 
width in the medial area), separated by flat, equally wide or 
slightly wider furrows ; the furrows are ornamented by trans- 
verse, close-set, slender threadlets. 
There are six teeth on each half of the hinge-line and its 
decurrent portions on the anterior and posterior side; those 
nearest the ligamental pit are oblique, the others are somewhat 
transverse. 
Dimensions.—Length of hinge, 2; umbo-ventral diam., 5:25 ; 
antero-posterior diam., 5 mm. 
Eocene.—“ Turritella-marls,” Aldinga Bay (six exs.). 
This species resembles Z. transenna, but has not the marked 
obliquity of that shell, and, moreover, the ribs are more numerous, 
with narrower interstitial furrows, and the transverse threadlets 
are finer and closer together. 
