‘ Fig. 12. Section of the base of a specimen of Hozoon. This specimen shows 
an oseuliform, cylindrical perforation, cut in such a manner as to show its 
reticulated wall and the descent of the laminz toward it. Two-thirds of 
natural size. From a photograph. Coll. Carpenter, also in Redpath Museum. 
[This illustration (from Prof. Prestwich’s ‘‘ Geology,” vol. ii., p. 21) has been 
courteously lent by the Clarendon Press, Oxford.] 
(3.) Beds of Fragmental Eozoon. 
If Eozoén was an organism growing on the sea-bottom, 
it would be inevitable that it would be likely to be broken 
up, and in this condition to constitute a calcareous sand or 
gravel. I have already in previous pages noticed Lau- 
rentian limestones containing such fragments, from the 
Grenville band at Cote St. Pierre, from the Adirondack 
Mountains in New York State, from Chelmsford, Massachu- 
setts, and from St. John, New Brunswick, as well as from 
3razil and the Swiss Alps. Indeed, the Laurentian lime- 
stones of most parts of the world hold fragmental Kozoon, 
In the Peter Redpath Museum are some large slabs of Lau- 
rentian limestone sawn under the direction of Sir W. H. 
Logan, and showing irregular layers and detached masses 
of Kozoén with layers or bands of limestone and of ophio- 
lite. These are evidently layers successively deposited, 
