Fig.\. Fig. 2. the admission of any particles of foreign matter; andthese objects are effected by the mechanism representedin fig. 4, which is a highly magnified view of the smalloval apertures seen along each side of fig. 2. In aquatic creatures the above arrangement of the MICROSCOPIC OBJECTS. 55… … Fig. 3. fig. 7 is therefore adopted. This system belongs to thelarva of a Dytiscus seen at fig. 5 of the natural size.
Microscopy
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