ANNIVERSARY ADDRESS OF THE PRESIDENT. Ivii 



of only two Crags, a. conclusion at wliich he had arrived after some 

 years' labour, but which he had not laid down on any previously 

 j)ublished map. 



This sheet of the map, embracing the counties of Norfolk and 

 Suffolk, is, perhaps, with the exception of the Crag, the least per- 

 fect portion of the work. With regard to the Boulder-clay, Mr. 

 Greenough had only laid it down in the Eastern counties, whereas, 

 as Mr. Prestwich observes, it should have been carried over half 

 of England. Unfortunately there was no one who could under- 

 take this, and the colour has therefore been entirely omitted in this 

 edition. I think it necessary to mention this circumstance, as a 

 mere inspection of the map might otherwise lead to some mis- 

 understanding. 



Mr. Godwin- A Listen contributed greatly to the revision of the 

 S.E. sheet, including the Wealden of Kent and Sussex, and the 

 members of the Cretaceous series. He also superintended and 

 laid doAvn from MS. notes, a sn^all portion of France, including 

 the Boulonnais, as being the physical continuation of the Wealden 

 area, and of Kent, Surrey, and Sussex ; and south of that area 

 some Tertiary outliers Avere mapped by Mr. Prestwich. 



As a considerable portion of the N.E. slieet, which includes 

 the S.W. of Scotland and parts of Ireland, had been left blank 

 in the jjrevious editions of Mr. Greenough' s map, it was con- 

 sidered by the Committee desirable that these portions also should 

 be coloured geologically. As respects Ireland, that portion in- 

 cluded in the map has been executed from MS. notes of Mr. 

 Godwin- Austen, aided by the map of Sir Eichard Griffiths ; and 

 as regards the S.W. of Scotland, considerable portions have also 

 been filled in by Mr. Godwin- Austen ; the Ayrshire coal-field is 

 from the original MS. of Mr. Geikie; and the remaining areas are 

 taken from the published Geological Map of Scotland by Sir E. 

 Murchison and Mr. Geikie, and a small portion of the Pentland 

 district from the 1-inch Geological Survey. 



In conclusion I must not omit the name of Mr. Mylne, one of 

 the most active members of the Committee, who acted as its 

 Secretary, and who deserves the greatest praise for his diligence 

 and good management in superintending most of the arrange- 

 ments with the engraver, and generally assisting the other mem- 

 bers of the Committee in the execution of their joint and labo- 

 rious undertaking. Although some few points still remain for the 

 last touch of the engraver, I trust that in a very few weeks the 

 map will be ready to be placed in the publisher's hands. 



Laurentian Fot^mation. — I have already stated that it is im- 

 possible for me to allude even bi'iefly to the many communications 

 which have been read before this Society during the past year ; 

 as a rule, indeed, I have followed tlie example of several of my 

 predecessors in abstaining altogether from any notice of them, 

 except under peculiar circumstances, as, in consequence of the 

 more rapid system of publication which we have recently adopted, 

 they are, with very few exceptions, already printed in our Journal. 



