NAUTILUS OF THE BROOKFIELD LIMESTONE—HONEYMAN. 13 
Art. IIl.—THr NAUTILUS OF THE BROOKFIELD LIMESTONE — 
NAUTILUS BROOKFIELDI, N. sp.— Rev. Dr. Honey- 
MAN, D. C. L. 
(Read January 10, 1887.) 
Our attention has been particularly directed to this subject 
by the presentation to the Museum of a fine specimen of this 
fossiliferous limestone, by J. J. FALCONER, of the Acadia Tron 
Works. Large quantities of this limestone from the Brookfield 
quarries, Colchester County, are used at these works in the 
reduction of the iron ores. Our specimen was happily rescued 
from the furnace. 
It measures 6 x 5 inches; its greatest thickness is four 
inches. It shows the distinct remains of a dozen nawtili. The 
habitation chambers of six individuals are seen upon one side. 
These are of medium size. Others that we have collected from 
the same limestones are larger. Those of our specimen measure 
2.2 inches along the outer curves. Another of the same size, 
which is separate and has parts of upper chambers attached, has 
a girth of 3 and 3.3. The form of the empty chambers is 
sub-eliptical ; the siphuncle is central. This species is very dis- 
tinct from the Nautilus avonensis, Dawson. Of this we have 
two larger body chambers from the Avon limestones, Windsor. 
The siphuncle has its characteristic position, dorsal. A still 
more beautiful specimen of the chamber of habitation of this 
species is from the Brookfield limestones. It is a cast full of 
the shells of brachiopoda. Its siphuncle is dorsal. It has two 
lateral ridges ; the middie is slightly convex. Our new species 
wants these ridves and the middle is concave. We name 
the species, Nautilus brookfieldi. The limestones are of Lower 
Carboniferous age. 
