...But when warm weather comes, a formclosely resembling them, but entirely destitute of gills, may beseen in the water swimming, or creeping clumsily about onland... 
W. E. Webb 「Buffalo Land」
...Back, dirtybrown, with the sides of much the same color, but ofa lighter tint; fins, very dark; very few distinct spots,with those showing very small; gills, 13 or 14...
Harry Thom Payne 「Game Birds and Game Fishes of the Pacific Coast」
...(Ganin thinks, that as theseinsects are somewhat aquatic, the adult insects flying over the surfaceof the water, the wings may act as respiratory organs, like gills...
Alpheus Spring Packard 「Our Common Insects」
...The gills ofaquatic insects only differ from those of worms in possessing tracheæ,though the gills of the Crustacea may be directly compared with those ofinsects...
Alpheus Spring Packard 「Our Common Insects」
...Nymph of May-fly (Chloeon dipterum) showing onright side wing-rudiment (a), on left tracheal gills (b)...
Geo. H. Carpenter 「The Life-Story of Insects」
...The penultimate abdominal segment has four long hollow outgrowths,which contain blood, and have the function of gills, while the hindmostsegment has four shorter outgrowths of the same nature...
Geo. H. Carpenter 「The Life-Story of Insects」
...' The walls of the fine air-tubes that pass into thegills are specially strengthened, but just below the pupal cuticle thesewalls are exceedingly thin and delicate...
Geo. H. Carpenter 「The Life-Story of Insects」
...Many yearsago was struck by the correspondence of insect wings tothe tracheal gills of may-fly larvae, which are carried on the abdominalsegments somewhat as wings are on the thoracic segments...
Geo. H. Carpenter 「The Life-Story of Insects」
...The water goes in and out of this syringe, and the larva breathes as thefish does, by means of its gills...
Margaret Warner Morley 「The Insect Folk」
...Those two feather-like parts at the tail end are gills...
Margaret Warner Morley 「The Insect Folk」
...The gills of fishes have a great many blood vessels running throughthem...
Margaret Warner Morley 「The Insect Folk」
...He is entirely destitute of gills, or any similaraperture, but respires and also spouts water through a pipeof semi-circular form placed on the upper part of the head...
Various 「Natural History in Anecdote」
...Now, the gills or respiratory organs also are formed at the fore-end ofthe alimentary canal...
Ernst Haeckel 「The Evolution of Man」
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