«nder the circumstances I owe it to Prof. Percival, to my scientific 

 and many colleagues, and to myself, to point out that, though from 

 the change above mentioned my short notes unfortunately precede the 

 detailed observations of the discoverer,-- yet that I have in my present 

 paper fully acknowledged them to the author ; and I desire to add still 

 a, little more. Not only that the observations which I give are from 

 specimens placed in my hands by Prof. Percival, but that it is to him- 

 self wholly that we owe this record of the presence of Eelworms at 

 Hop roots ; a discovery of great interest and value, both scientifically 

 and practically, and involving points of such skilled and minute in- 

 vestigation as place the observer in the highest ranks of our own 

 Nematologists, and claim that the credit of his discoveries should be 

 carefully preserved to their author. 



E. A. Oemerod. 

 February, 1895. 



* To be published in ' Natural Science ' for March. Macmillan & Co., Bedford 

 Street, Strand, W.C. 



