By drinking the water which contains the cercaria of this species, they grow infested by this singular lodger.
A migration of the cercaria is indispensable to its perfection.
The infusoriform larva of the Dicyemid, and the cercaria of the Trematodes, are such forms.
This organised nurse, which is about a line in length, is the cercaria cystophora of Wagener.
Dr Guido Wagener figures similar structures as occurring in cercaria macrocerca.
The cercaria setifera of J. Mller has been found free and attached to the lower surface of some medus.
There are some grounds for comparing the scolex to the cercaria of Trematodes, cf. Archigetes.
It is always of a deep colour, and is doubtless introduced in the state of cercaria, when the animal is drinking.
cercaria cer·car·i·a (sər-kâr'ē-ə)
n. pl. cer·car·i·as or cer·car·i·ae (-ē-ē')
The parasitic larva of a trematode worm, having a tail that disappears in the adult stage.