gill-slit

Thus we see the fate of representative, political democracy, which survives as a sort of vestigial reptile brain or fetal gill-slit in the era of scientific government.

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The chief differences are, that (a) the tongue-bar is the essential organ of the gill-slit in _Balanoglossus_, and exceeds the septal bars in bulk, while in

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" Various

The collar is the first commencement of a structure destined to assume great importance in _Cephalochorda_ and _Craniata_, and perhaps protective of a single gill-slit in _Balanoglossus_ before the number of those apertures had been extended.

Form and Function A Contribution to the History of Animal Morphology

Between these two arches he found an opening, just as between two gill-arches a gill-slit.

Form and Function A Contribution to the History of Animal Morphology

He describes how in the embryo of the Blenny there is a short, thick arch between the first gill-slit and the mouth.

Form and Function A Contribution to the History of Animal Morphology

He refused to accept Huschke's derivation of the auditory meatus from the first gill-slit.

Form and Function A Contribution to the History of Animal Morphology

The first gill-slit, or, as Rathke here prefers to call it, pharyngeal slit, closes completely in snakes and in Urodeles.

Form and Function A Contribution to the History of Animal Morphology

In most species of _Balanoglossus_ each gill-slit may be said to open into its own atrial chamber or gill-pouch; this in its turn opens to the exterior by a minute gill-pore.

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" Various

Like Rathke, he found only three indubitable gill-slits, but he noticed that the body-wall in front of the first gill-slit was really composed of two arches, which were on the whole similar to the gill-arches.

Form and Function A Contribution to the History of Animal Morphology

(gill-arches), and immediately in front of the first gill-slit lay the developing lower jaw.

Form and Function A Contribution to the History of Animal Morphology