In many aquatic larvae we find that all the spiracles are closed up, or become functionless, except a pair at the hinder end which are associated with some arrangement - such as the valvular flaps of the gnat larva or the telescopic " tail " of the drone-fly larva - for piercing the surface film and drawing periodical supplies of atmospheric air. [Please select]
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The cement-tissue debouches, I believe, only through the functionless larval antennæ, except in one species, _L. [Please select]
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He states that the trophi are soft and functionless, which is far from the case. [Please select]
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These muscles existing in the true bottle-nosed whale had a special interest, as the teeth in that whale were rudimentary and functionless. [Please select]
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The internal digit and the external one are thin and short; they are functionless, as a rule, taking no part in supporting the limbs on the ground. [Please select]
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