Tertiary. | PALZONTOLOGY OF VICTORIA. (Mollusca. 
narrow deep transverse sulci of the inner lip with the much broader 
flat intervening spaces representing the dental ridges, but it is 
easily distinguished by its more egg-shaped form, much shorter 
canals, and concealed spire. 
Very rare in the Lower Miocene or Oligocene Tertiary strata of 
Moorabool River. 
EXPLANATION OF FicuREs. 
Plate XLIX.—Fig. 2, dorsal view, natural size. Fig. 2a, view of base of same specimen. 
Fig. 26, posterior end view of same specimen. Fig. 2c, side view of same specimen. 
Prats XLIX., Fias. 3, 4. 
CYPRHA (LUPONIA) CONTUSA (McCoy). 
DescripTion.—Small, thin, globular, transverse section nearly circular ; longi- 
tudinal profile of back highest at one-third the length from the posterior end, from 
whence it forms nearly a quadrant of a circle in front, a little elongate at base of 
beak ; abruptly falling from same point to the slightly projecting spire, which is of 
three slightly convex whorls, the apex being obtusely pointed and prominent; 
anterior canal very short with an abruptly reflexed margin, and with a very deep 
rounded notch, the sides slightly expanded and separated from the back by a narrow 
impressed sulcus; posterior canal deeply notched to level of spire, defined on left 
side by a small semicircular ridge, the right boundary twice as long, formed of the 
rounded or subquadrate lobe forming the posterior end of outer lip. Mouth narrow, 
inarched to lett side at posterior end to level of spire; inner and outer lips slightly 
thickened, defined before and behind by small prominent marginal ridges; each lip 
with about 21 regular, narrow, prominent, dental ridges, narrower than the intervening 
spaces. Whole surtace of back irregularly reticulated with small contusions or 
irregular polygonal bruise-like depressions, bounded by irregular, faintly marked, 
transverse ridges on the posterior portion, the intervals being crossed by irregular 
longitudinal wrinkles, both sets losing all order in the irregular wrinkled reticulation 
of the middle and anterior portion of back; lateral small flanyes, and back of 
anterior and posterior canals smooth. Average length, 1 inch 2 lines; proportional 
width, 743; ; height, ;4°;; diameter of umbilicus and spire, 155; length of anterior 
canal, +8; ; backward extension of outer lip or right edge ot posterior canal, —1°,. 
This common little species is curiously distinguished by its 
surface seeming to be covered with little bruises or indentations of 
irregular size and shape resembling a minutely shrivelled fruit ; 
[ 8? ] 
