PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
SESSION 1858-59. 
CONTENTS. 
Monday , 6th December 1858. 
PAGE 
Opening Address, Session 1858-59. By Professor Kel- 
land, . . . . .110 
Account of the Life and Labours of Or William Gregory. 
By Dr Alison, ..... 121 
On the peculiar Appendage of Appendicularia, named 
“ Haus” by Mertens. By Professor Allman, . 123 
Additional Observations on the Morphology of the Repro- 
ductive Organs in the Hydroid Polypes. By Profes- 
sor Allman, • . . . .123 
Donations to the Library, . . . .138 
Monday , 20 th December 1858. 
On the First Properties of Matter — Inertia, Gravitation, 
Elasticity — referred to a common Law. By John G. 
Macvicar, D.D. Communicated by Professor Fraser, 146 
On the Structure and Functions of the Branchial Sac of the 
Simple Ascidise. By Andrew Murray, Esq., . 148 
Donations to the Library, . . . .150 
[ Turn over 
