Noun:

ஈரல் தட்டைப்புழு இடைப்பருவம்,

cercariae's Usage Examples:

c, Nearly ripe cercariae; cc, cystogenous cells; dr, daughter-redia; dt, limbs of the digestive tract; f, head-papilla; h, eye-spots; h', same degenerating; k', germinal cell; 1, cells of the anterior row; m, embryo in optical section, gastrula stage; n, pharynx of redia; o, digestive sac; oe, oesophagus.

D, An adult redia, containing a daughter-redia, two almost mature cercariae, and germs.

In this situation it becomes much swollen and banded with colours, and produces a large number of ecaudate cercariae.

The number of cercariae produced by the pullulating rediae in a single water-snail is immense, and as they are emitted at a given period or a few successive periods, the snail at these times appears enclosed in a cloud of whitish flocculent matter.

For example the schistosome cercariae are generally shed during daylight, in the morning, whilst those of other species emerge only at night.