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THE HAMILTON ASSOCIATION, 71 
been made recently. Sections of Dr. Head’s Genera Rusosignum 
(Wrinkle Sponge) are rarely found in a good state of preserva- 
tion, as noticed by the jate A. E. Walker. When found un- 
decayed, or unweathered, they display, invariably, a peculiar deep 
biue color never found in other Sponge Sections, which renders 
them conspicuous when some considerable distance away. 
The writer’s first visit to the fields along the brow of the 
escarpment, towards the Albion Mills, was early in September. 
I was pleased to find, from the nature of the crops in my favorite 
hunting ground (the one beyond the reservoir, adjoining the 
young orchard), that it presented a fair prospect for collecting 
sponges and sponge sections, when the crops were harvested. 
Beans, potatoes, Indian corn (planted in rows) are favorable for 
collecting. On proceeding further, to have a look at another 
field, which has been under clover for some years, where several 
fine sponge sections were obtained some years ago, in the distance 
it appeared as if the maize had been broadeast there. On passing 
it, subsequently, on my way to the Mount Albion waterlime quar- 
ries, I ascertained I was mistaken, and managed to secure the 
unweathered sections of a species of Rusosignum (Head), retain- 
‘ing the peculiar dark blue color. This I have placed in a Mu- 
seum case, with a few other sponges, and is the only one of the 
kind we possess, I believe. As far as I recollect, the late Presi- 
dent of the Section, A. E. Walker, attributed the marked decay 
of Rusosignum sections to the looseness of the spicules. They are 
exceedingly dense, he remarked, in the numerous and well pre- 
served sections of our plain, globular sponges. ; 
The Albion Mills waterlime quarry was visited nearly at the 
end of September, chiefly with the view to secure a second speci- 
men of the large Favosites, similar to the one placed a few years 
back in our upper sidecase. I pointed out its position to one of 
the men employed there, who mentioned he would put aside for 
me any large round lumps found in the soft shale bed. On arrival 
‘I discovered the quarries had not been worked, apparently, for 
some time. The old workings were covered with weeds and 
grasses, rendering it difficult to discover any organic remains. T 
