1915 161 p., 4 tissue guarded chromolithographed plates, later wrappers with typed label pasted on front wrapper. A very good revision with excellent full colour illustrations. This was published in the Journal of the College of Science, with the title page of the issue (bound in), and the title page of the volume (loosely inserted). Cancelled stamp on front wrapper, another stamp in first page top margin. Tissue guards a bit spotted, otherwise a very good copy of this scarce work.