On St Michael’s Mount and the Phenicians. 181 
brought and used by the Mediterranean traders as long as 
it continued fit for service. When the traders ceased to 
visit Mountsbay these forsaken ruins were gradually and 
completely buried beneath the sand driven in by the winds 
from the shore, and the turf had from time immemorial 
until 1849 being growing over them. 
One of the bronze fragments I presented, soon after their 
discovery, to the Museum of Economic Geology in London, 
where there is also a cast of the block of tin described by 
Sir Henry. The other fragments, with some of the char- 
coal and slag, I have now presented to the Royal Institu- 
tion of Cornwall, so that the block itself and a part of the 
furnace in which it may have been melted, may be seen, 
side by side, at its Museum in Truro, confirming, in a most 
singular manner, a passage in the history of Britain written 
before the Christian era. 
_ Descriptions of New Genera and Specres of Diatoms from the 
South Pacijic. By R. K. Grevittz, LL.D., F.R.S.E., &.* 
Part II. (Plate IV.) 
GRAMMATOPHORA. 
: 
| 
/ 
| 
| 
Grammatophora pusilla, n. sp. Grev.—Small ; septa un- 
dulate, with the inner ends incurved ; undulations becoming 
obsolete towards the margin; striz obscure. Length of 
| frustule about ‘0018". (Plate IV. fig. 15.) 
Hab.—Curteis Straits, Queensland, in a dredging com- 
municated by Dr Roberts of Sydney. 
_ Melting House, near Penzance, is very nearly the same as was that of the bronze 
| furnace now described. 
* Read before the Botanical Society of Edinburgh, 9th July 1863. 
NEW SERIES.—VOL. XVIJI NO. 11.—OcTOBER 1863. Qa 
i 
