Yol. 50.] ANNIVERSARY ADDRESS OE THE PRESIDENT. 89 



low horizon in the Cambrian System, and the authors even intimate 

 that the lowest beds of the limestone may belong to the same category. 

 As regards correlation of this horizon with other areas, it has been 

 stated by Dr. Hicks that do definite Olenellus-fauna, had been dis- 

 covered at St. David's, but he believed that the horizon was indicated 

 by the Lingulella prinueva-zone, which occurs near the base of the 

 Cambrian and several hundred feet below the lowest Paradoxides- 

 beds. Subsequently he remarked that he had found fragments of 

 Olenellus at St. David's associated with a species of Conocoryphe. 

 Amongst other facts of interest connected with the palaeontology of 

 this horizon, the probable association of Olenellus with Salterella, as 

 pointed out by Dr. Woodward, from beds at Kimberley in Western 

 Australia, seemed to indicate the existence of Lower Cambrian in 

 that continent also . 



Physical Relations and Post-Cambrian Metamorphism of the Rocks 

 in the North-west Highlands. — With the account of the discovery of 

 the Olenelli(s-f&ima, in this region the study of the fossiliferous 

 Cambrian terminates. Henceforth we have no further concern 

 with a definite palaeontology, and must consequently fall back upon 

 such other indications as may be available. Before venturing on 

 the wide subject of the Fundamental Rocks, or the yet wider one of 

 the Miscellaneous Rocks, I am reminded by a glance at Messrs. 

 Peach and Home's sections, in North-west Ross- shire, how greatly 

 our knowledge of the whole region from Loch Eriboll to the neigh- 

 bourhood of Loch Maree has been increased of late years. The 

 history of these investigations is well known to most of you, and 

 part of the story was well told by Prof. Bertrand in the Geological 

 Magazine about a year ago. 1 Now, we have it on record that 

 Messrs. Peach and Home's first communication to the Society re- 

 sembled several papers rolled into one. It treats, in fact, of a 

 variety of subjects in connexion with the geology of the North-west. 

 Amongst these subjects are the physical relations and post-Cambrian 

 metamorphism of the various rocks which make up the district. 

 As the events in which the Cambrian rocks were involved are held 

 •to have taken place previous to the deposition of the Old Red Sand- 

 stone, they clearly belong to some portion of Older Palaeozoic time, 

 and may therefore be considered in connexion with the rocks of 

 that period. 



The remarkable series of sections which the Authors exhibit in 



1 Geol. Mag. 1893, pp. 118 et seqg. 



