Forms in which schizogonic reproduction is of general occurrence
during the extra-cellular, trophic phase. Three genera,
_Ophryocystis_, _Schizocystis_ and _Eleutheroschizon_, different
peculiarities of which have been referred to above. Mostly parasitic
in the intestine or Malpighian tubules of insects. (In this type of
parasite, as exemplified by _Ophryocystis_, the body was formerly
wrongly considered as amoeboid, and hence this genus was placed in a
special order, the _Amoebosporidia_.)
[Illustration: From Wasielewski, after Leger.
FIG. 16.--Spores of various Gregarines.
a, _Eirmocystis, Sphaerocystis_, &c.
b, _Echinomera, Pterocephalus_, &c.
c, _Gregarina_, &c.
d, _Beloides_.
e, _Ancyrophora_.
f, _Stylorhynchidae_ (type of).
g, _Menosporidae_.
h, _Gonospora terebellae_.
i, _Ceratospora_.
k, _Urospora synaptae_.]