mission to Assam, he communicated to the Society the first two of a
series of valuable papers on the development of the vegetable ovulum in
_Santalum_, _Loranthus_, _Viscum_, and some other plants, the anomalous
structure of which appeared calculated to throw light on this still
obscure and difficult subject. These papers are entitled as follows:--

1. On the Ovulum of _Santalum album_. Linn. Trans. xviii. p. 57.

2. Notes on the Development of the Ovulum of _Loranthus_ and _Viscum_;
and on the mode of Parasitism of these two genera. Linn. Trans. xviii.
p. 71.

3. On the Ovulum of _Santalum_, _Osyris_, _Loranthus_ and _Viscum_.
Linn. Trans. xix. p. 171.

"Another memoir, or rather series of memoirs, "On the Root-Parasites,
referred by authors to _Rhizantheae_, and on various plants related to
them," occupies the first place in the Part of our Transactions which is
now in the press, with the exception of the portion relating to
_Balanophoreae_, unavoidably deferred to the next following Part. In
this memoir, as in those which preceded it, Mr. Griffith deals with some
of the most obscure and difficult questions of vegetable physiology, on
which his minute and elaborate researches into the singularly anomalous
structure of the curious plants referred to will be found to have thrown
much new and valuable light.

"In India, on his return from his Assamese journey, he published in the
'Transactions of the Agricultural Society of Calcutta,' a 'Report on the
Tea-plant of Upper Assam,' which, although for reasons stated avowedly
incomplete, contains a large amount of useful information on a subject