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Updated: May 8, 2025
The Amoebae, for instance, will patiently lie in wait for the new-born Acinetes, as they leave the maternal ovary; being aware that these must as yet be lacking their poisonous tentacles. Now, the Amoebae have neither a nervous system nor distinguishable organs of any kind.
And, in order to understand every thing from the beginning, you must look through microscopes at the movements of amoebae, and cells in worms, or, with still greater composure, believe in every thing that men with a diploma of infallibility shall say to you about them.
Desire not only causes us to seek that which we need, but is a form of attraction by which the good is brought to us, just as the amoebae create a swirl in the waters that brings their food within reach. Every desire in nature has a fixed and definite purpose in the Divine Economy, and every desire has its proper gratification.
Like these unicellular Protozoa, the colourless blood-cells creep slowly about, their unshapely plasma-body constantly changing its form, and stretching out finger-like processes first in one direction, then another. Like the Amoebae, they take particles into their cell-body.
The first cell-communities to be formed, which laid the early foundation of the higher multicellular body, must have consisted of homogeneous and simple amoeboid cells. The oldest Amoebae lived isolated lives, and even the amoeboid cells that were formed by the segmentation of these unicellular organisms must have continued to live independently for a long time.
These creatures differ from the amoebae inasmuch as instead of pseudopods, they have developed tiny vibrating filaments, or thread-like appendages, which are used for drawing in their prey and for moving about. These filaments are permanent, and are not temporary like the pseudopods of the monera or amoebae they are the first signs of permanent hands and feet.
It is interesting to note, in this connection, that while the ordinary cells of the higher animal body resemble the monera in many ways, still the white corpuscles in the blood of man and the animals bear a startling resemblance to the amoebae so far as regards size, general structure, and movements, and are in fact known to Science as "amoeboids."
In appearance and movements they are very like amoebae and the white corpuscles of the blood. Their motion, along with the streaming movement of rotation in the layer of white granular protoplasm that flows along the walls of the cell, under the high powers of the microscope "presents a wonderful scene of vital activity."
In like manner, when at the lowest round of the organic ladder the animal is simply a shapeless jelly, homogeneous and viscous, all parts of it are equally suited to all functions; the amoebae, indifferently and by all the cells of its body, can walk, seize, swallow, digest, breathe, and circulate all its fluids, expel its waste, and propagate its species.
But gradually small communities of Amoebae arose by the side of these eremitical Protozoa, the sister-cells produced by cleavage remaining joined together. The advantages in the struggle for life which these communities had over the isolated cells favoured their formation and their further development. We find plenty of these cell-colonies or communities to-day in both fresh and salt water.
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