466 NOTES AND REFERENCES. 



PAGE 



219. On Arctic Flora (Trans. Linn. Soc., vol. xxiii. p. 251). 



220. The parts between brackets were not in the original disco arse. 



221. For instances of retrocession or degradation, see Quarterly 



Review, Oct. 1869. 

 225. DARWIN, Origin of Species through Natural Selection, 1866, in 



which see also Dr. McDonnell's results. 

 HUXLEY, Address to the Geological Society, Feb. 21, 1862. 

 LYELL, Antiquity of Man, 1862. 



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