91 



On the Structure of Orbitolites. 



Inaugural Address op the President, Dr. W. B. 

 Carpenter, C.B., F.R.S. &c. 



(Delivered October 24th, 1884J 



It having been intimated to me that a new President was rather 

 expected to give an Address on first appearing amongst you, I have 

 thought I could perhaps best fulfil the object of giving what 

 encouragement I can to Microscopical workers, by a little history of 

 my own study of the Orbitolites. * I began the subject nearly 40 

 years ago, and finished it only last year ; and I propose to bring 

 before you some of the points of general interest which have pre- 

 sented themselves to me during this prolonged inquiry. 



Fig. 4. 



Shelly Disk of Orbitolites complanata, showing concentric rings of chamber- 

 lets, arranged round a central nucleus. 



* A general description of this type, with illustrations, is given in " The 

 Microscope and its Revelations." The Author's complete Monograph of the 

 genus will be found in Vol. VII. of the Challenger Reports. 



Journ. Q. M. C, Series II., No. 11. I 



