M. S.. T. II

— On a remarkable group of Diatomaceous forms, with re-

marks on shape and outlineasa spécifié character in the Diatomaceæ. (T. M. S., T. III, pl. II, 1855).

— On a Post-tertiary lacustrine Sand containing Diatomaceous

exuvia from Glenshira near Inverary. (Q. J. M. S. T. III, pl. IV, 1866).

— On thepresence of the Diatomaceæ, Phytolitharia and Sponge

spiculés in soils which support végétation. ( Edin . Bot. Soc. Proc., 1855).

— On the Post-tertiary Sand of Glenshira (Part II) containing an

account of a number of additional undescribed species. (TV. M. S. T. IV, pl. VIII, 1855.) Continuation T. XV, pl. I, 1857).-

— Notice on some new species of British fresh-water Diatoms.

(Q. J. M. Sc., T. IV, pl. I, 1856.)

— On new forms of marine Diatomaceæ found in the Firth of

Clyde and Loch Fine. (Trans. of the Roy. Soc. Edin., T. XXI, 4°, 1857.)

— New forms of Diatomaceæ found in the Clyde and Loch Fine,