1884. ] Notes on a New I[nfusorian. 663 
longitudinally and split up each moiety into transverse filaments, 
when the resultant creature would bear a strong likeness to 
Ctedoctema, and would probably be relegated to the same genus. 
As it is, the observer must be in some doubt as to the ordinal 
position of Ctedoctema. Does it, in common with Cyclidium 
and Uronema, belong to the Ciliata-Holotricha, or to the Ciliata- 
Heterotricha? The boundary between the two orders is so in- 
distinctly defined that the doubt becomes a serious one. 
However, the cilia which have led me into this side issue remain 
standing, like the sentinels they are, beside the adoral sinus. 
While the animal is feeding they are not actively vibratile, al- 
though the whole row has the power of bending in a body across 
the groove. I have seen them waving back and forth in an un- 
broken line like an animated comb. Each member of the group 
also has the ability of separately bending in a direction away 
from the median line, and it uses this accomplishment when a 
food-particle, too large or otherwise unacceptable, must be dis- 
carded, several often flirting themselves in unison outwardly when 
there is too great an accumulation about the oral aperture. When 
ir possessor is swimming they are drawn up against the ven- 
tral surface parallel with the margin of the adoral groove, and 
consequently in contact with each other, their free ends thus 
Pointing posteriorly. 
I have found it quite impossible to use the camera lucida in 
drawing the details of these active little animals, The figures are 
etefore more or less diagrammatic, with the exception of the 
frst, In the second (Fig. 2) an attempt is made to show the ani- 
mal ʻi its lateral aspect, with the coarse comb of adoral cilia, the 
anterior ciliary tuft and the single row of long, laterally-disposed 
te hairs, as well as the nucleus and the contractile vesicle. 
n Fig. 3 Ctedoctema exhibits its ventral surface, especially the 
aig &roove, with the ciliary comb on its margin, laterally 
above it and surrounding its termination posteriorly. 
of mon found, it is said, only in the flesh of members 
: iliata, are numerous in Ctedoctema, huge in proportion to 
hiti we of the infusorian, and possessed of peculiarities not 
noticed in connection with those of any other member 
Of the class : 
t... Fhe action of the recently-recommended solution 
fannie acid 
FSS conspic 
in glycerine for the purpose of rendering tricho- 
uous, is eminently successful and satisfactory. 
