If the original larva is without an alimentary tract, the second form becomes what is known as a sporocyst.
Here the embryo sheds its ciliated integument and is transformed into a sporocyst.
We may give more than one description of the distomian embryo as it leaves its sporocyst.
Within this snail—Linnæa truncatula—the egg develops into a sac-like body, called a sporocyst.
When stripped of their swimming tunic, these young distomes have the form of a bag, which for a long time was called a sporocyst.
We sometimes find the cercarian age passed over, and the young distomes appear abundantly without tails in the sporocyst.
The embryo, having long cili in front, and in the interior a sporocyst already full of young cercari, is shown in Fig. 44.
The Cercari are developed from spherical masses of cells found in the body cavity of the sporocyst or Redia.
The Cercari when fully developed leave the sporocyst or Redia, and then their host, and become free.
It develops during the encapsuled state into a cystic worm, equivalent to the sporocyst of Trematoda.
sporocyst spo·ro·cyst (spôr'ə-sĭst')
A larval form in many trematode flatworms that develops in the body of its molluscan intermediate host.
A secondary cyst that develops from a sporoblast and produces within itself one or several sporozoites.