Meanings of primitive fishes in English

The primitive fishes were mostly of the shark kind.

From the primitive fishes or Selachii, the earliest Gnathostomes, was developed the legion of the Ganoids.

Then, moving upward diagonally, they would go past the Ordovician (the first primitive fishes).

From these primitive fishes were evolved higher fishes of the ganoid type and others of the type of Lepidosiren (Dipneusta).

Hence the original formation of the skeleton of the mouth can be traced to these primitive fishes, from which we have inherited it.

This is equally true of the ova of our small bony fishes and of the colossal ova of the primitive fishes, reptiles, and birds.

The gastrulation of the primitive fishes or selachii (sharks and rays) has been carefully studied of late years by Ruckert, Rabl, and H.E.

Among the fishes the selachii, or primitive fishes, yield the most important information on these and many other phylogenetic questions (Figures 1.161 and 1.162).

Hence we find in the primitive fishes a blastula with a small eccentric segmentation-cavity (Figure 1.55 b), the wall of which varies greatly in composition.

Man's ancestors are fish-like Craniotes: (1) Primitive fishes (Selachii); (2) plated fishes (Ganoida); (3) amphibian fishes (Dipneusta); (4) mailed amphibia (Stegocephala).