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Menneli & Chubb—Mammalia found with Stone Iniplements. 448 
var. stipitata, by Pergens & Meunier in 1887; the authors divided that 
species into three varieties, of which the form st:pitata has a narrow. 
stem and discoid head like the English specimens. Some workers at 
Bryozoa would no doubt include the Danian, the French Maastrichtian, 
and the British Turonian varieties as all members of one species, 
which would then have the name B. wrnula (d’Orb.).' But the 
differences between the specimens from these three horizons seem 
adequate for their specific separation. The &. urnula, the type 
species of the genus, has a vasiform body, which is convex below and 
passes gradually into the short stem, while the apertures of the zocecia 
are on tufts or radial keel-like plates projecting above the body. 
B. rotaformis, the oldest representative of the genus, has a wheel- 
shaped body on a narrow stem, and the apertures are on vertical teeth 
on the sides of the body. The Danian forms are very variable in 
form; the stem is longer and narrower than in B. urnulu, but it still 
passes by a gradual expansion into the body; the usual form of the 
zoarium is more piriform than in B. rotaformis. Further differences 
are that in the Danian forms the stem is perforate, and the apertures 
of the zocecia open on.ridges which project but slightly from the disc ; 
in one specimen of var. st¢pitata one of the ridges projects upwards as 
one of the spine-like processes so characteristic of the genus. Though 
B. rotaformis is variable, the lower side of the body is apparently 
always concave, whereas in the Danian forms—which I regard as 
a new species with the name B. pergensi—and in B. urnula the base is 
always concave. Both Dr. Rowe and Mr. C. D. Sherborn, who have 
collected a considerable number of specimens of B. rotaformis, tell me 
that they have not seen one with a vasiform body, and my more 
limited experience has been the same. 
V.—On an Arrican Occurrence oF Fosstr MaMMALIA ASSOCIATED 
with Srone IwpeLEMENTs. 
By F. P. Mennett, F.G.S., and E. C. Cuusn, F.Z.S., of the Rhodesia 
Museum, Bulawayo. 
.\ TONE implements have long been known to occur in South Africa, 
S but nearly all the recorded discoveries have, until quite recently, 
been made at the Cape. Indeed, it is only lately that the subject has 
attracted much attention, and that the circumstances of their occurrence 
have been at all fully investigated. Even now there is little precise 
information on the point, and yet it is essential to the solution of the 
problems they present. For, as one of us has previously pointed out,’ 
in attempting to ascribe to their proper source the stone implements 
found in South Africa, we are confronted with difficulties that are 
unknown in Europe. Not only has the country been inhabited down 
to the present day by tribes like the ‘ Bushmen’ unacquainted with 
the working of metals, and whose origin probably long antedates the 
1 Fasciculipora wrnula, d’Orbigny, 1850: Prod. Pal., vol. ii, p. 268. Bicavea 
urnula, @’Orbigny: Bry. Crét.: Pal. Frane., vol. v, 1854, p. 956, pl. 776, figs. 1-2. 
2 See Fourth Annual Report of the Rhodesia Museum (1904), which contains the 
first published descriptions of Rhodesian stone implements. 
