CONTENTS. 



PAGE. 



I.— Peeface, by Sir W. E. Logan, F.R.S., Director of the Geological 



Survey of Canada .* 5 



II. — On the CrsTiDEiE of the Lower Silurian Rocks of Canada. By 



E. Billings, Esq., F.G.S 9 



III.— On the Asteriad^ of the Lower Silurian Rocks of Canada. By 



E. Billings, Esq 75 



IV.-vOn Ctclocystoides, a new genus of Echinodermata from the Lower 

 and Middle Silurian Rocks, By J. W. Salter, Esq., F.G.S., of 

 the Geological Survey of Great Britain, and E. Billings, Esq.. 8G 



V. — On the Palaeozoic Bivalve Entomostraca of Canada. By T. R. 



Jones, Esq., F.G.S 91 



