26 
character of its reproductive process. I make this observation here, because 
Heeckel has retained the word in naming his examples of the very lowest 
and entirely structureless plasms under the heading Gymnomonera. The 
"protogenes" and "protomceba" are discoveries of his own, not to be 
confounded with the familiar Amceba princeps of our handbooks. The 
confusion occasioned by calling all organic plasms Amoeboid which shew 
the contractile movement first recognised in the typical Amceba, renders 
it very difficult, as I have remarked in my former paper, to reconcile the 
statements of different writers who are describing different animals, which 
should be referred to different species and groups, according to their life- 
history and phases of development. Thus Huxley's " specks of jelly '■ are 
the Protogenes and Protamceba of Hseckel— not the Amoeba princeps, 
Nucleuria, Arcella, and Gregarina-amoeboid, all of which have nuclei, 
vacuoles, and other characters of a differentiated organism. So much I have 
thought it right to add as a corollary to the statements and arguments 
brought forward in my last paper. I now confine my remarks to the 
proper subject of this paper — the Monads of Haeckel and Cienkowski, 
placed under the heading " Lepo-Monera," which forms Heeckel' s second 
division of Monera. 
By the term "Lepo-Monera" we are to understand simple naked plasma- 
masses, without nucleus or membrane, which at a later phase of their life- 
history become encysted — that is to say, become motionless, then surround 
themselves with a covering or shell, and while in this state undergo a 
special reproductive process. This encysted or encapsuled state during 
reproduction is common to a variety of vegetable as well as animal organ- 
isms whose Zoospores appear afterwards with the characteristic of 
Amoeboid contraction. 
The following genera of Lepo-Monera are enumerated by Heeckel. 1, 
Protomonas — P. amyli. 2. Protomysa. 3. Vampyrella. 4. Myxastrum. 
Protomonas. A simple, shapeless, protoplasm body, without vacuoles. 
It protrudes simple or ramifying pseudopoda, and reproduces by Zoospores 
which unite together into one netlike plasmodium. Further description is 
unnecessary, as we meet with the same general character in Monas Amyli, 
of which I now shew Cienkowski's drawing, and proceed to give a con- 
densed account, taken from the writings of that accurate observer. 
Fig. 1 represents the Monad Amyli full of Zoospores. Fig. 2, the 
Zoospores when free. Fig. 3, an Amoeboid development of Zoospore, or 
rather a contractile plasm which, being devoid of nucleus or vacuole, has 
no claim to the name Amoeba. Fig. 4 represents the union of several such 
