NOTES ON A COLLECTION OF TERTIARY LIMESTONES. 
(?) Leprauia ef. crassatina, MacGillivray. 
Lepralia crassatina, MacGillivray, 1895, Trans. R. Soc., Vict., 
Vol. IV., p. 74, pl. vili., fig. 4. 
Our example is represented by a small cluster of encrusting 
zooecia, somewhat inflated, with sub-hexagonal margins. In its 
general characters it agrees with the above species, with the excep- 
tion that many of the zooecia tend to become sub-elliptical by 
crowding. It has the porous front wall to the zooecium and semi- 
circular thyrostome as in the above form. Mr. Maplestone has 
pointed out to me that MacGillivray’s species appears to belong 
more properly to Macropora than to Lepralia. A comparison 
may be made with Macropora clarkei, T. Woods sp.* That 
species, however, has a generally depressed or even concave zooecial 
wall, and the zooecia are distinctly broader than in our form. 
(?) L. crassatina occurs throughout our Tertiary series, being found 
in the lower beds of the Muddy Creek series, at the Moorabool River 
and Waurn Ponds; and is also found living off New Zealand. 
Found attached to a valve of Placunanomia in the polyzoal rock 
of the Seal River. 
ADEONA sp. 
A portion of the branched stem which supports the flabellate 
zoarium occurs on the surface of one of the slabs of polyzoal lime- 
stone. It measures 40 mm. in length and 27 mm. across at the 
widest part, where there are nine branches. 
BRACHIOPODA. 
MAGELLANIA cf. DivaRIcaTA, Tate sp. 
A cast of a brachiopod shell occurs in the hard pink limestone, 
which is referable to one or other of the closely related species M. 
divaricata, Tate sp.t or M. garibaldiana, Davidson sp.{ The 
radial plication seen in the present example is common to both species, 
but the shell of M. divaricata is typically narrower, and shows a 
marked lateral compression in the region of the beak, also to be 
seen in our specimen. 
PELECYPODA. 
PINNA RETICOSA, SP. NOV. 
(Plate VI., Fig. 8.) 
_ Description.—Shell triangular, elongate. Valve moderately con- 
vex, with a strong umbonal ridge, slightly sinuous throughout its 
length. Antero-ventral border short and curving backward to 
meet the postero-ventral edge in a rounded angle. Posterior border 
* MacGillivray, op cit., p. 55, pl. viil., figs. 5. 6. 
{ (2) Waldheimia divaricata, Tate. Trans. Phil. Soc., Adelaide, 1880, p. 10, pl. viii., 
figs. 8, a, b. 
Hi tWaldheimia garibaldiana, Davidson. Geologist, vol. v., 1862, p. 446, pl. xxiv., fig. 9. 
W. macropora, McCoy. Prod. Pal. Victoria, Dec., v., 1877, l. xliii., figs. 4, 6. W. garibaldiana, 
Dav., Tate, Trans. Phil. Soc., Adelaide, 1880, p. 7, pl. xi., figs. a-c. 
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