Tertiary. | PALZONTOLOGY OF VICTORIA. [ Mollusca. 
by the much shorter and narrower anterior canal, with much 
smaller, oblique, ridge-like tubercles, by the reflected posterior canal 
being replaced by a one-sided quadrate lobe or end of the outer 
lip, by the very much shorter, smaller, and narrower tooth-ridges 
on the inner lip, and by the remarkable quadratic curvature or 
inarching towards the left side of the posterior third of the aperture 
and toothed outer lip. 
The species seems to vary very little in any respect. The sub- 
stance is thin and light. 
Common in the blue Oligocene Tertiary clays and limestones 
near foot of Mount Eliza and Mount Martha, Mornington. 
EXPLANATION OF FIGURES. 
Plate XLIX.—Fig. 1, dorsal view of average specimen, natural size. Fig. 1a, basal view 
of same specimen. Fig. 10, end view of same specimen. Fig. 1c, profile view of same specimen. 
PratEe XLIX., Fie. 2. 
CYPRHA (ARICIA) CONSOBRINA (McCoy). 
Description.—Ovate, thick, back very convex, base thickened; columella 
moderately flattened, and sloping inwards at a marked angle; transverse section 
four-fifths of a circle; dorsal profile with greatest height a little behind the middle, 
anterior portion only tapering a little more gradually than the posterior portion ; 
anterior canal very short, slightly reflected, obtuse, deeply indented by the notch, 
not very sharply defined from the back, and only slightly extended laterally by an 
obtusely rounded thickening of the base; two slight oblique indentations with 
obsolete cbtuse ridge between them at dorsal middle of base of anterior canal ; 
posterior canal similarly short, obtuse, and imperfectly defined, and not distinctly 
reflected ; base thickened, convex in middle, with a slight, obtusely rounded, exten- 
sion on sides of anterior and posterior canals; aperture narrow, gently arched 
towards the left side behind ; outer lip rounded and strongly inflected with about 30 
rounded teeth, short on middle and behind, lengthened on the flattened, very steeply 
sloped, anterior third; inner lip flattened and steeply sloped inwards, with long 
narrow transverse deep sulci, with broader flattened dental ridges between them. 
Surface smooth. Length, 2 inches 8 lines; proportional width, 4%°;; height, 7%‘. 
This species seems a near relation of the C. eximia and C. 
platypyga in its heayy thick substance, form of the flattened and 
thickened base and inner lip and the peculiar character of the long 
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