As the tegument includes the viscera and forms therefore the trunk alone, they may thus also be designated Trunk-animals.
Second Province. Sarcozoa.
3104. As in the animal body, bones, muscles, and encephalic system are suddenly associated with the tegumental system; so also does a second series of animals, having these systems, suddenly originate. Now, as the first formation of the osseous system is the vertebra, so all these animals have, as is generally understood, a vertebral column, and are on that account indeed Vertebrata; but, they are much more than this, and hence the title is of too limited a character. Besides there are among them animals, in which only the chorda dorsalis is present, without the ring of the vertebral body being formed around it.
Along with the animal systems the head is for the first time developed with its organs of sense—Cephalic animals.
These animals have consequently, in addition to the general sense of feeling, a true tongue, nose, ears, and eyes—Cephalæsthetic animals.
B. ANIMAL CIRCLES.
3105. Animal Circles are representations of entire anatomical systems as self-substantial bodies.
3106. Now, the vegetative body divides into three principal systems, into the Intestinal, Vascular, and Respiratory system, with their functions, or the digestive, nutritive, and respiratory processes. There are therefore Intestinal, Vascular, and Respiratory animals.
Circle I. Intestinal Animals.
3107. The intestinal system is the first form of body, or that from which the other systems have not yet separated. The body of these animals consists therefore of the homogeneous primary mass—the animal protoplasma, mucus or slime—Mucus-animals.