Tertiary.) PALAZONTOLOGY OF VICTORIA. (Mammalia, 
This species is much more abundant than the C. Leggei, and 
I dedicate it to the Rev. Mr. Price, of Geelong, who first discovered 
it and brought to me several specimens, and to whom I am much 
indebted for preserving and forwarding to the Museum many of the 
fossils of the Tertiary strata of that neighborhood. 
The smaller and less pyriform involution of the inner side, the 
distinct though small posterior bilobation, and the much thinner 
and higher outer wall enclosing an obviously larger cavity, render 
it easy of recognition. The usual oblique articular projection on 
the upper side of the posterior part of the thick involution beimg 
distinctly marked, is another character separating it easily from the 
C. Leggei, which is curiously peculiar in completely wanting any 
trace of it. 
Not uncommon in the Miocene Tertiary strata of Waurn Ponds, 
near Geelong. 
EXPLANATION OF FIGURES. 
Plate LIV.—Fig. 2, average specimen, natural size, viewed from above. Fig. 2a, same 
specimen viewed from below. Fig. 26, same specimen viewed from behind. 
Prats LIV., Fias. 3, 4, anp 5. 
CETOTOLITES NELSONI (McCoy). 
Description.—Oblong, broad and distinctly bilobed behind, rather suddenly 
tapering to the depressed nearly rectangular wedge-shaped anterior end, on the inner 
and lower sides of the Eustachian outlet; under side divided longitudinally into two 
convex portions by a distinct narrow concavity, deepest where it strongly bilobes the 
posterior end, gradually becoming obsolete at the flattened wedge-shaped anterior 
end; involnte inner side small, club-shaped, swollen above posteriorly, suddenly 
narrowed at about the middle of the length, the narrow anterior convexity subsiding 
into the flattened anterior wedge-like truncated end; a strong oblique articular pro- 
jection on posterior part of upper convexity, in front of which is an oblique depression 
extending forwards and downwards, and distinctly notching the exterior of the inner 
side of the bone; all the inner edge of the involute part marked with irregular plice 
extending forwards and downwards; posterior half of tympanic cavity very large 
and deep, suddenly defined by a raised thickening, extending from the involute inner 
part to the outer wall, leaving a rugged surface for the much shallower anterior 
portion of cavity ; over-arching outer wall very thin, much elevated behind. Length, 
2 inches 5 lines; greatest width, 1 inch 7 lines; greatest width and depth of involute 
part, 11 lines; width of truncated anterior end, 8 lines. 
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