9. _Haematococcus palustris_, Girod (= _Chlamydococcus_, Braun,
_Protococcus_, Cohn), one of the _Chrysomonadidae_; ordinary
individual with widely separated test.
a = nucleus.
b = contractile vacuole.
c = amylon nucleus (pyrenoid).
10. Dividing resting stage of the same, with eight fission products in
the common test e.