THE HAMILTON ASSOCIATION. 119 
if applied to such a body as the Royal Geological Society of 
Great Britain and Ireland. 
I may be permitted to call attention to Sir Wm. Dawson’s 
description and figures of Rhizopods in his very interesting work, 
“Tife’s Dawn on Earth.” Sir William notices the intimate re- 
lationship between the Rhizopods and Sponges, however unlike 
they may appear to us at first sight. 
January 27th, 1893. 
ANNELID BURROWS, TRAILS, FUCOIDS, ETC. NO. III. 
Although I have already alluded to each and all of the above in 
our local rocks in ‘Notes on Silurian Plants,” still further information 
is required by correspondents who have had no opportunity or 
examining any of the original specimens submitted for your in- 
spection. No doubt without seeing the objects, and in the absence 
of correct figures, it is exceedingly difficult to arrive at any satisfactory 
conclusion regarding their nature. It may be permitted me to furnish 
a few additional remarks, even while regretting that circumstances 
may prevent us from figuring the original specimens themselves. 
A well-known fossil botanist in the United States recently re- 
quested me to send him copies of some papers on Silurian Plants 
published by the Hamilton Association, which attracted the notice of 
a scientific publication in Washington. I was aware considerable 
difference of opinion existed regarding problematic organisms, so- 
called, and believing I had in my possession, or transmitted to 
friends, better preserved ones than are elsewhere obtainable, I was 
only too pleased to furnish my correspondent with a copy of the first 
paper on the subject, which appeared in our Proceedings, and sub- 
sequently I forwarded a brief description of a few specimens of the 
late Mr. Billings’ Licrophycus (species as yet probably un- 
described). These were procured (as the Geological Section knows), 
shortly after a paper was read at a general meeting, and the ad- 
ditional note was only incorporated in the annual issue as a sort of 
postscript to the former communication. 
The absence of bituminous matter appears to be the chief 
point relied on for rejecting the Silurian Fucoids as plants 
at all, no matter how well defined the form may be. Several 
years ago I produced for the inspection of members of 
the Botanical Section (as well as our own), specimens of well- 
