A YORKSHIRE NATURALIST in 



series might be regarded as mere varieties of one 

 species. 



All these conclusions will be found in my paper in 

 the January number of the Magazine of Natural 

 History for 1848. But another procedure was now 

 suggested. In 1848 Dr. William Carpenter had 

 been investigating the structure of some fossil 

 Nummulites, also Foraminifera from the Tertiary 

 beds of South- Western France, after which he also 

 turned his attention to some of the recent Forami- 

 nifera, and it was recommended that he and I should 

 combine our observations and conjointly produce 

 some elaborate work on the Foraminifera ; the final 

 conclusion arrived at was that I should prepare a 

 monograph on the recent Foraminifera of Great 

 Britain, and that he should produce a volume on the 

 general study of the Foraminifera. This plan was 

 carried out, and my volume was published by the 

 Ray Society in 1857, and Carpenter's was issued by 

 the same society in 1862. 



Meanwhile various other interesting points were 

 attracting my attention. About this time I sent to 

 the Yorkshire Philosophical Society a short 

 memoir entitled " On the Scaly Vegetable Heads or 

 " Collars from Runswick Bay supposed to belong to 

 "the 'Zamia gigas. 1 " This memoir was published 

 in the " Proceedings " of the Society, and the subject 

 still in 1 894 continues to excite considerable interest 

 as well as a large amount of dispute as to its nature 

 and affinities. In 1822, Young of Whitby had 



