president's addeess. 115- 



characterized by the great abundance of Vitreous Sponges, which 

 seem to be nearly related to, if not identical with, the Ventricu- 

 lites of the Chalk. This year's work has produced many forms 

 new to science, and many new to the British Fauna. Among 

 the most remarkable in the groups I have been working at I 

 may mention a very singular Echinoderm, representing a totally 

 new group of the Sub-kingdom ; a splendid new Ophiurid ; 

 Brisinga endecaenmnos ; many specimens of Sars' RMzocrinus 

 Lofotensis ; many Vitreous Sponges, including specimens of Afh- 

 rocallistes, Holtenia, and EJijalonema ; a fine Solarium fi'om the 

 coast of Kerry, and many other things. 



*' As I am only writing in the interval of scaling the boilers, 

 with no opportunity of going over the collection, you must ac- 

 cept this sketch. I trust to your contributing the Crustacea, 

 which will be sent to you as soon as possible. 



"I will write again from Lerwick. 



' ' Ever yours truly, 



""Wtviile Thomson." 



APPENDIX B. 



THE FAUNA OF THE GREATEST ABYSSES OF ALL OCEANS. 



In the following table* is shown the relative frequency in the 

 occurrence of the principal groups of animals at the fifty-two 

 stations at which Dredging or Trawling was effected by the 

 ' Challenger,^ in depths which exceeded 2,000 fathoms, irrespective 

 of the nature of the bottom, whether Grlobigerina Ooze, Eadio- 

 larian Ooze, Diatomacean Ooze, Eed Clay, or Gray Mud. 



Pisces 20 



Cephalopoda 2 



Gasteropoda 7 



Lamellibranchiata ... 12 



Brachiopoda 8 



Timicata i 



Polyzoa 18 



Macroura 24 



Schizopoda 4 



Edriophthalma 7 



Ostracoda 8 



Ch-ripedia.... 7 



Pantopoda 2 



Gephyrea , 7 



Annelida 21 



Holottiuroidea 16 



Echiuoidea 9 



Asteroidea 15 



Ophiuroidea 18 



Criuoidea 3 



Zoantharia 14 



Alcyonaria 16 



Hydromedusffi 4 



Porifera 26 



* This table is compiled from those given in the ' Challenger' Eeport by Sir Wyville 

 Thomson, Vol. I., p. 36, -37, 



