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Presents letters to the editor on matters related to wildlife. Role of wildlife in environmental conservation; Adventures of hunting in Alaska; Use of the term "Heavey Syndrome" in human evolution.

Mr. H. M. Ami, F.G.S., of the Geological Survey of Canada, who has devoted special attention to the fauna of the Utica Shale in the neighbourhood of Ottawa, lately sent me for examination several fragments of slabs of this rock containing some peculiar sponge remains, which seem to me to be worthy of notice, although, from their mode of preservation, no decisive determination as to the character of the sponge.to which they belong can be arrived at.

Some specimens of Cherty rock forwarded to England for determination some years since by Mr. H. Y. L. Brown, F.G.S., Government Geologist of South Australia, have lately been submitted to me for examination by my friend Dr. H. Woodward, F.R.S., and their structure, as shown in thin sections, seems to me sufficiently interesting to be recorded. The specimens in question are of a light or yellowish-grey tint, with a waxy lustre, in some portions compact and in others minutely porous, which makes them light to the feel. The rock is hard, scratching glass readily, and there is no reaction with acid.