[Plate VII.]—Fig. 1, Cheiracanthus microlepidotus. Fig. 2, Magnified scales. Figs. 3, 4, 5, 6, 7, 8, Vegetable impressions of the Old Red Sandstone.

[Plate VIII.]—Fig. 1, Diplacanthus longispinus. Fig. 2, Diplacanthus striatus. Fig. 3, Magnified scales of fig. 1. Fig. 4, Spine of fig. 2, slightly magnified.

[Plate IX.]—Fig. 1, One of the tail flaps of the gigantic Crustacean of Forfarshire. Fig. 2, Reticulated markings of Carmylie.

[Plate X.]—Fig. 1, Cephalaspis Lyellii, copied from Lyell's Elements of Geology, Fig. 2, Holoptychius nobilissimus, copied on a greatly reduced scale from Murchison's Silurian System, Fig. 3, Scale of Holoptychius, natural size. Fig, 4, Tooth of ditto, also natural size. These last drawn from specimens in the collection of Mr. Patrick Duff, of Elgin.

DIRECTIONS TO THE BINDER.

Sheet of Sections to front Title-Page.
Plate I.tofrontpage44
II."""46
III."""48
IV."""66
V."""72
VI."""78
VII."""82
VIII."""84
IX."""136
X."""154

[NEW WALKS IN AN OLD FIELD;]

OR,