References 

 Appendix: Table 4. 

 Plate X . 



CONTENTS 



page 224 



• 225 



following page 228 



THE RELIABILITY OF DEEP-SEA REVERSING THERMOMETERS (published 

 27th May 1958) 

 By H. F. P. Herdman and L. H. Pemberton 



Introduction ^^■^^ ^3' 



Errors and eccentricities ^32 



Calibration and certification of deep-sea reversing thermometers 233 



Protected Thermometers ^3 



Change with age in the zero point and scale corrections 236 



Effect of the volume of mercury (Fo) ^37 



Incidence of failures 39 



Unprotected Deep-Sea Reversing Thermometers 240 



Zero point . '^ 



Mean pressure coefficient CP') ^4^ 



Summary ^'^ 



References ^ 



OCTOCORALS PART I. PENNATULARIANS (published 9th December 1958) 



By Hjalmar Broch 

 Introduction 



Veretillidae .... 

 Renillidae .... 

 Umbellulidae 



Revision of the genus Umbellula 



Key to the species of Umbellula 



Spiculate species of Umbellula 



Non-spiculate species of Umbellula 



Zoogeographical remarks on Umbellula 



Pennatulidae 



Pteroeididae 



References 



Plates XI, XII ... • 



page 247 

 248 



251 

 251 



251 



252 



252 



254 

 271 



276 



278 



279 



following page 280 



