Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 964
EYES 90/ … or squares; each facet is the corneule of a separate ocellite, andhas a convexity of its own; hence, by counting the facets, wecan ascertain the number of ocelliin each compound eye. In the twoeyes.of the common fly there areas many as 4,000 ; in those of thecabbage-butterfly there are about17,000…
Microscopy
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