
LIFE-HISTORIES AND THEIR LESSONS, 201 

through the stages seen in 111 @ and rv a, until at length it fell 
upon. the alga to which it was attached, as seen in 0 4, Fig. 12, 
This was watched, and at length there escaped from it the living 
form, roughly drawn at ¢, which passed through the stage d into 
the proper form a, A. anser, shown at e. These drawings have 
been in my portfolio since August, 1872, when they were made, 
and I should almost entirely have forgotten it, but a friend, know- 
ing of the incident, and reading Professor Huxley’s Anatomy of 
Invertebrated Animals, just as it came out in 1877, called my 
attention to page 103, where we read, ‘“‘Encystment, whether fol- 
lowed or not by division, is very common amongst all the ciliata, 
and a species of Amphileptus has been seen to swallow, or rather 
envelope, a stalked bell-animalcule, and then become encysted 
upon the stalk of its prey, just as Vampyrella becomes perched 
upon the stalk of the devoured Gomphonema.” ‘Thus an explana- 
tion of the seeming transmutation of Vorticellan and Paramecian, 
and good evidence that it was not even uncommon, was forth- 
coming. 
But amongst other illustrations of a similar kind, we were 
shown, recently, an instance of what it was contended was the 
emergence of a Paramzecian from chlorophyll granules in Nitella! 
The circulating granules in the decaying plant were said to have 
“become ” an animal! 
I can easily, from my own portfolio and that of others, produce 
similar instances. Fig. 13, Plate IV., shows some of the cells of 
a leaf of Anacharis alsinastrum, with their circulating chlorophyll 
granules. I have often seen, what is again and again recorded in 
treatises and monographs,—the presence of minute animals, as 
Paramecia and Rotifers, within the cells of aquatic plants, as 
Vaucheria, Sphagnum, Nitella, and others. At a is an instance of 
this; the minute Parameecian Oxytrichia pellionella, the 1-700 of 
an inch in length, was seen within the cell moving freely, and on 
being carefully followed was seen to “ encyst,” to become still and 
round in the midst of a cell, as at 4. But we all know, who watch 
the cyclosis of particles within the cells of aquatic plants, that at 
times the granules get loose from the current, as at ¢, a, e, but as 
these flowed up they were stopped by the encysted animal, eventu- 
ally covered, and at length, from the chlorophyll mound within the 
cell, an active Paramecian wriggled and escaped, ultimately emerg- 
ing altogether by the rupture of the cell-wall of the decaying leat. 
The conjurer seems to take numberless eggs out of a burning candle. 
The mound of chlorophyl granules, taken as such, seems to change 
into a Paramecian; in both cases it is not what it seems ; It 1s 
something else to careful investigation. 
It may be difficult to explain how these forms enter the cells of 
plants, but not more so than to explain how the spores of fungi 

