In an especial degree I have to acknowledge the kindness of Dr.J.E.GRAY, F.R.S.for valuable additions and corrections in the list of the Ceylon Reptilia; and to Professor FARADAY for some notes on the nature and qualities of the "Serpent Stone,"[1] submitted to him.

I have recorded in its proper place my obligations to Admiral FITZROY, for his most ingenious theory in elucidation of the phenomena of the _Tides_ around Ceylon.[2] [Footnote 1: See Vol.

I.Part II.ch.iii.p.

199.] [Footnote 2: See Vol.II.Part VII.ch.i.p.

116.] The extent to which my observations on _the Elephant_ have been carried, requires some explanation.