ANNIVERSARY ADDRESS OP THE PRESIDENT, 



197 



higher. If Prof. Geikie is right in saying that the Scotch Old Red 

 Sandstone represents the Irish Glengariff beds, then Prof. Hull may 

 be right in concluding that the Scotch beds are the lacustrine equi- 

 valents in time of the marine uppermost Silurian strata, the Upper 

 Scotch Old Hed being the equivalent of the same in Ireland. 



Table XV. — Devonian. 



Classes. 



Plantae 



Protozoa 



Hydrozoa. 



Actinozoa 



Echinodermata 



Annelida 



Crustacea 



Polyzoa 



Brachiopoda 



Lamellibranchiata 



Gasteropoda 



Pteropoda. 



Heteropoda 



Cephalopoda 



Pisces 



12 

 3 



24 

 10 



2 

 20 



7 



26 

 20 

 13 



2 

 6 



50 



195 



52 

 24 

 2 

 37 

 11 

 116 

 39 

 45 



60 

 125 



544 



Contents : 195 genera, 544 species. 



Pass to Carboniferous : 32 genera, 51 species. 



Carboniferous System. 



"We must go back beyond the present decade for new matter 

 bearing upon the history and distribution of the British Carboni- 

 ferous species — not that any significant change has taken place in 

 the nomenclature or division of the groups, but speculative and 

 philosophical views have been propounded by many authors upon 

 the distribution and redistribution of the Carboniferous land- 

 surfaces and their relation to still older areas. No one has con- 

 tributed more than Professor Hull to the elucidation of the Carbo- 

 niferous strata in England, Scotland, and Ireland. This is notably 



VOL. XXXVII. p 



