UNRECORDED GENERA OF THE OLDER TERTIARY FAUNA. 171 
Genus /usus. 
Subgenus Tectifusus, nov. 
As suggested by M. Cossmann, I remove my Fusus tholoides 
and I’, Aldingensis to form a new subgenus, Tectifusus, charac- 
terised by the tectiform and costulated pullus. 
Genus Latirofusus. 
This genus was founded by Cossmann in 1889 for the reception 
of Fusus funiculosus, Lk., and ’. decussatus, Desh., of the Parisian 
Eocene; he refers to it the living /. lancea, Gmelin, placed by 
Tryon in Latirus. As suggested by Cossmann J. aciformis, mihi, 
proves to belong to Latirofusus. I have recently described a 
species inhabiting Southern Australian waters under the name of 
Latirofusus nigrofuscus. Species of this genus have a narrow 
elongate spire with a hemispheric embryo, the aperture is small 
and rounded, the canal straight and nearly closed, the columella 
obliquely plicated. 
Genus Concholepas. 
C. ANTIQUATA, sp. nov., PI. x., fig. 2. 
This aberrant genus of Purpuride is represented by C. Peru- 
viana, Lk., ranging from Peru to Patagonia, and C. Deshayesi, 
Rambur, of the Miocene of Touraine. The discovery of a third 
species by Mr. G. B. Pritchard in the clays at Mornington, Port. 
Philip Bay, and in the calcareous sands at Muddy Creek, Hamilton, 
extends the stratigraphical range to the Eocene. 
J am unacquainted with C’. Deshayesi, either by description or 
figure; but compared with C. Peruviana our fossil presents the 
following differences:—The great variability of the ornament of 
the living species and the fact that the fossil species is known to 
me by only two examples make it difficult to select a character 
which may prove to be specific rather than individual. In respect. 
of shape, the fossil is more tumid with a larger spire, the suture 
of which appears deeply impressed (arising from the steep slope 
intervening between the actual suture and the convex rib which 
ends at the posterior angle of the aperture). The prominence of 
