^ournllNLTn^^^^^ S^outmeous Generation. 263 
on, dividing and subdividing, and at the same time the continuation 
of hfe. 
The 17th day was cold and dull. I could not discover anything 
different from what I had seen before. 
On the 18th I observed some of the highest developed forms 
that have yet been discovered, either by M. Pouchet, Dr. Hughes 
Bennett, or, so far as I have seen, any one else. M. Pouchet 
describes this, or a form figured by him which I take to mean the 
same thing as this, to be the ova of Parameeium. At first I 
observed a number of groups of molecules collected together into 
various shapes, and some appeared in the act of dividing, or as if a 
larger and a smaller had joined together (Fig. 10). Each of these 
groups was enveloped in a proligerous membrane, and at a little 
distance from this was to be seen another membrane, and these 
again were attached, or rather imbedded, in another free one, which 
outer one was thickly studded with molecules of matter, and the 
whole infusion was swarming with vibriones, which appeared larger 
than I had before seen. 
We now come to some remarkable forms, which appear rather 
more advanced than those figured by Pouchet, and copied by Dr. 
Hughes Bennett;* but if they be the same, only in a different 
position, I have found that what Pouchet took to be a nucleus is 
in reality an orifice. In this case they would come very near to, 
if not identical with, Prorodon niveus ; but these are more pyri- 
form. But I could not detect the toothed mouth, or the polygastric 
system (Figs. 11, 12). These organisms were constructed of the 
protoplasmic film, thickly studded with molecules, which latter 
were rather larger than the generality, and were more sharply 
defined. It will be observed that the orifice of one of the specimens 
is at the larger end, whereas in the others it is at the smaller end. 
These specimens measured about xoio o^^ of ^'^ i^ch in their widest 
diameter. One specimen I observed quite different from the rest. 
The protoplasmic film had rolled itself round a long axis, and 
formed an orifice very much like the genus Stentor, and which this 
specimen also reminded one of in its elongated form (Fig. 11). 
The molecules imbedded in the film forming this organism were 
arranged, more or less, in longitudinal lines. This measured 5-0V0 th 
of an inch in its widest diameter, by yoio 0 of i^^ch long. I could 
not discover any movement in these, either ciliary or otherwise. 
On the 20th day we arrived at the highest development in the 
direction of animal life that I have been able to obtain ; that is, if 
we except some very remarkable vibriones that I observed on the 
38th and 44th days. This, as will be observeed, is a hollow ellipse, 
and is formed of the protoplasmic film, and is rather sparsely studded 
with what appeared like very minute tadpoles (Fig. 13). This 
* ' Popular Science Eeview,' fig. 5, p. 55. 
