252 
line of about 70 mills. diameter, and a thickness of 20 mm. (but 
it will be probably a little more in a perfect specimen). The 
surface is smooth, the growth-folds few and somewhat lamellar, 
and imbricating at the sides; the test is thick, as much as 2 mm. 
in the umbonal region, and densely punctate. On account of the 
thickness of. test, probably, there is no external indication of a 
mesial septum. It may bea very large form of 7’. swbcarnea, but 
if it be a Magellania, then it is new, and I suggest for it the 
name J. cyclica. It cannot be an extremely large UM. insolita, 
which is the only Australian species that makes an approach to 
it, but that shell is elongate-oval, the beaks attenuated and sub- 
erect, exposing a broad and high deltidial area, and a small 
foramen, in contrast with the circular outline, stout incurved 
beak, and a moderately-sized foramen. 
Genus Mace.uani4, Bayle, 1880 (nomen mote 
Waldheimia, King, 1849, non Brullé, 1846. 
M. eorioensis, McCoy, 1877 ; id., Tate, 1, p. 156. 
Eocene.—Mannum (S. Aust.); Corto Bay, Muddy Creek, 
Mornington (Vict.). Post-Eocens.—Spring Creek near Geelong 
( Vict.). 
M. (?) Crouchii, 7. Woods, 1865; id., Tate, 1, p. 153. 
Eocrene.—Movunt Gampier (8. Aust.). 
M.(?) divarieata, Tate, 1, p. 149. 
Eocene.—River Murray Cliffs at Mannum (8S. Aust.); Moora- 
bool and Spring Creek (Hall and Pritchard). 
M (?) fimbriata, Jate, 1880, 1, p. 150. 
EocrnE.—ALDINGA Bay (8. Aust.); Cape Otway (Vict.). 
M. fureata, Tate, 1, p. 148. 
Eocene.—Moorabool Valley ( Hall and Pritchard), Cape Otway 
(Vict.); ALpINGA Bay and Port Vincent (S. Aust.). 
M. Garibaldiana, Davidson, 1862; id., Tate, 1, p. 146. 
Eocrene.—River Bremer near Callington, River Murray Clifis, 
Croydon-bore 1,000 ft. (S. Aust.); Muddy Creek, Gelibrand 
River, Mornington, Moorabool Valley, Corio Bay, Airey’s Inlet 
and Shelford (Victoria). 
Post-Eocene.—Table Cape (Tasmania). 
M. grandis, 7.- Woods, 1865; id., Tate 1, p. 152. 
EocenE.—River Murray Cliffs and Mount GAMBIER ( S. Aust.) ; 
Shelford and Maude (Vict.). 
Post-EocENE.—Table Cane (Tasmania). 
M. gravida, Suess, Voy. Novara, Palzont., p. 56, t. 9, fig. 5 (Waldhermia). 
Waldheimia concentrica, Hutton, Cat. Tert. Moll., N.Z., p. 35, 
1873. 
