LI 
No. 400.] A FLAGELLATED HELIOZOAN. 257 
plasmic process was the lashing of a flagellum, and not the 
beating of a cilium. 
While the spores of Heliozoa are in several cases flagellula, 
the possession of a series of flagella by the adult forms has 
been noted in but one other case. Eugène Penard (* Sur un 
heliozoaire nageur, Myriophrys paradoxa, gen. nov., sp. nov.” 
Arch, Sci. Phys. et Nat., Tome IV, No. 9, pp. 285—289, Pl. III, 
I5 Septembre, 1897) describes a single individual which he 
Fic. 2. 
found in fresh water, also in August. This animal was about 
40 in diameter. It was furnished with pseudopodia of the 
Acanthocystis type, and possessed an external skeletal layer 
beset with minute scales (écailles). There was a large con- 
tractile vacuole and an evident nucleus. It therefore will be 
seen that in several essential characters it differed wholly from 
the form here described. Concerning the flagella, Penard says : 
* On pourrait plutót comparer ces cils à de petits flagellums, qui, 
par leur abondance, formeraient une véritable chevelure." 
Penard considered the flagellated condition to be permanent, 
