Evenings at the microscope : or, Researches among the minuter organs and forms of animal life (1884)
Gosse, Philip Henry, 1810-1888 · London : Society for Promoting Christian Knowledge · leaf 111
which is sometimesstrengthened by being attached to two horny plates,which project inwardly. But the most curious thingto be noted in the structureof these spiracles is the con-trivance which induced meto call them trap - doors.Small as are their openings,they are still large enoughto admit many… … SriBACLE OF FLY. guardedwith some sort of sieve, or filter, which, while admitting the air, shall exclude the dust- INSECTS : THEIR BREATHING ORGANS. 99 Various and beautiful are the modes in which thiscommon purpose is effected, but I can show you only twoor three. This is one of the breathing…
Zoology · Microscopy
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