NOTES ON SOME FREE-SWIMMING ROTIFERS. 73 
the ciliate, flagellate and tentaculiferous Infusoria, he tells us that, 
originally intending the work to run on the lines of “ Pritchard” 
he had collected a vast amount of material on the various subjects 
there treated—too much in fact to be brought within the limits of 
a book of reasonable size, hence its limitation to the above subjects. 
Let us hope, however, that this material will not be allowed to lie 
idle, but that he may find the time, and have the inclination to 
render a further service to the cause of science. Every Micro- 
scopist, who has paid any attention to these interesting animals, 
