86 ON THE OCCURRENCE OF CHALK 
on the surface of some clean water contained in a glass beaker or 
ther vessel ; the larger and more cavernous foraminifera float on 
the surface of the water, while the broken fragments, much of the 
der, and many of the denser seri oT are 
deposited at the bottom of the vessel as a sedim v 
light and finely oe — are got rid of by epaieint the 
milky geet liqu 
n the ent ite aren reveals the presence of the 
smaller Eamiacaiion, of a few sponge spicules, and minute grains 
of what are evidently siliceous nae igneous rocks. 
The further examination showed that the material is limestone, 
having a yery close resemblance to a both in chemical com- 
position and in physical properties colour it is not the 
dazzling” ioc cacboat ts torn e — ut rome a closer resemblance to 
ERS., Tyne, who 
devoted himself to the study of fo venunaifrows deposits — ie 
ized as one of the first authorities u thes 
irst, let me speak of your chalk from the New Britain 
eer I suppose you have ascertained that it is a cretaceous 
and not a friable tertiary limestone. All a foraminifera, 
so, are south Atlantic recent deep-sea species, Globi- 
gerina bulloides, Gl. inflata, Paleinatin Menardii (a t thick 
variety which I do not think is yet named), P. omen 
and probably P. Macctia, Pullenia spheroides, Nonion won e- 
pressula, Bulimina Buchiana, fragments of Dentalina. Beigori 
&e.; also a characteristic pulvinulina with thick shell and oney- 
mbed surface, not yet described, of which I haye quantities 
the “Challe er” material * * * The whole of the “Challenger ” 
foraminifera have been handed over to me to work out.” 
answer to a question as to the locality and mode of occur- 
rence e of the material used for the carvings, The Rev. G. Brown 
to me as follows :— 
“The chalk of which the figures are formed is, I am informed, 
alr found on the beach after an earthquake, being cast up there 
pieces by the tidal wave; it is only found, as far as we know 
at present, in one district on the east side of New Ireland.” 
Spe a ER a i SS a a in ae ees 
iba et 
2 
