392 A. A. C. ELIOT MERLIN ON THE MINIMUM VISIBLE. 



(1/1 12,200th) in., the diameter obtained by me from Dr. Coles's 

 specimen by extinction measurement. The latter method is 

 certainly not second to Dr. Dallinger's in exactness, whileit is 

 undoubtedly less laborious. Through no fault of his own, Dr. 

 Dallinger's uncorrected figures put the diameter of the flagellum 

 at half its true dimensions. 



Journ. Quekett Microtcopical Club, Ser. 2, Vol. XII., No. 75, November 1014. 



