viii List of Woodcuts. 



PAGE 



Granite in Gabbro, Pen Voose 4^ 



Banded Gneisses ■ 491 



Geological Map of Coast near Landewednack 492 



Diagram sketch of band of pseudo-agglomerate 502 



Diagram of Bursting Rock at Dent Head 511 



Piloceras invaginatum ?, Salter 542 



Sections of siphuncle of Piloceras, sp 543 



