A Relationship of Repetition, as of Infusoria, Mussels, Worms. There is also a Relationship of Series, which takes its rise from the parallelism of the classes. The two last relationships have been confounded together under the term analogy, which at best is but a word of random definition.
Second Province—Sarcozoa, Cephalozoa.
FOURTH CIRCLE—SARCOSE ANIMALS.
3302. The system of motion and sensation, which broke forth so forcibly in the tegument, now passes over into other forms, into the globular form of bone, the fibrous form of flesh or muscle, and the point-form of the nerves.
3303. The nervous system when liberated from the vegetative organs is, or consists of, the myelon (spinal chord) and the encephalon, i. e. brain.
3304. These animals are therefore Osseous, Muscular, and Encephalic animals, whereupon the senses are proportionately developed, and constitute the basis of the highest animal forms—Sarcozoa. The Dermatozoa are asarcose or fleshless animals.
3305. With the sudden appearance of the animal systems all organs of the head, such as tongue, nose, ears, and eyes, are also developed; no asarcous animal has nostrils. Now these parts, especially the nostrils, as marking the terminal extremity of the vertebral column, make up the head—Cephalozoa, or Cephalic animals.
Class 10. Osteozoa, Glossozoa.
3306. The animals, in which the osseous system for the first time makes its appearance are, the Fishes.
The Fish alone has more bones than any other animal. It has dorsal rays, which are wanting in all others.