I 4 “ 
Notes and Comments. 
the figures are A. hyperbolicus, A. subtensis, Mg. fmitimnm „ 
A. neglectus, and A. hastatus. We are permitted to reproduce 
the illustration of Mg. finitimum, which may be taken as a 
fair example of the illustrations. Perhaps the most remarkable 
ammonite is hyperbolicus from the Kellaways Rock of Red 
Azg. finitimum from Robin Hood’s Bay. 
Cliff. Scarborough. Mr. Buckman is to be congratulated 
on the progress he is making with this work. 
ROCKALL 
At a recent meeting of the London Geological Society. 
Professor J. W. Judd. C.B., F.R.S., gave the following general 
account of the geology of Rockall. Rockall is a small isolated 
rock in mid- Atlantic, lying 184 miles west of St. Kilda ; it 
has a circumference of only 100 yards and a height of 70 feet, 
and, except in the very calmest weather, is quite inaccessible- 
It is the haunt of sea-birds and, with its whitened top, resembles 
a sailing ship, for which it has often been mistaken. The 
rock rises from a bank (the ‘ Rockall Bank ’) upon which 
there are several dangerous reefs. More than 300 years ago 
it was reported that a large island occupied the site of Rockall, 
and for a hundred years or more, all Atlantic charts represented 
this island, which was named ‘ Busse Island,’ with a number 
of other islands and islets, as present in the North Atlantic. 
Taking these supposed facts in connection with the famous 
classical stories of an ‘ Atlantis,’ the theory was often ad- 
vanced that the North Atlantic was an area of subsidence, 
and that the reported islands — and, in the end, Rockall — 
were the last vestiges of the famous vanished continent. 
Modern research has, however, quite disposed of this theory - 
AXD ITS GEOLOGICAL STRUCTURE. 
Nevertheless, Rockall is of considerable interest, especially 
Naturalist. 
