662 Notes on a New Infusorian. 
air which one so soon learns to associate with the action of fine 
cilia. When the animal is swimming, those anteriorly placed 
are snugly packed away longitudinally in the adoral groove, 
Occasionally they are quiescent long enough at other times to 
exhibit their length and tufted arrangement, when they are held 
arcuately parallel with and below the adoral depression. 
Near the left hand margin of this elongated sinus is a single row 
of long fine vibratile cilia, whose points of attachment are much 
more widely separated than those on the general cuticular surface. 
Their vibrations seem to be at right angles to the course of the 
adoral groove, but the facility with which the direction of pti 
ment in such delicate filaments may be misinterpreted is remark- 
able. After those intervals, few and far between and at best of 
but momentary duration, when they become quiet and visible, 
their action certainly seems to be renewed, and they to fade from 
view, as the animal lies upon its side, not by a lateral wegen 
by a downward flashing of the whole series; that such 1s 
fact, however, I am not prepared to say ; it only seems so. 
Attached to the right margin of the adoral sinus wa 
in cilia which, so far as I am aware, is possessed by no other y 
: ; i : ony 0 Its 
sorian. It is really musical in the beauty and the harm meet 
arrangement. The ciliary constituents of this delightfu A 
factory series are each much coarser and stouter than Ta ; 
on the creature. Placed in a single row and ee 
over the adoral depression, they begin anteriorly whe it 
from the frontal margin equal to about one-third of gar 
length of the groove, the first and foremost cilium ae A 
shorter than the animal’s transverse diameter, the length i 
succeeding one becoming a little less than pa behind aS 
the last just rises above the surface i member 
somewhat to the left side of the oral aperture. with 
this comb-like appendage not only curves ee ya thickening : 
regular curvature of the series, but has a ae apparet 
its distal extremity whereby that free end is ian powet 
contact with its neighbor. Under insufficient M inte poste: 
this state of affairs presents the aspec -pofa 
riorly originating flagellum, or the lowermost — fe striking 
hood; and when thus examined the animal Poe we have only : 
resemblance to Pleuronema or Cyclidium. In oodelike vm 
to imagine the former as having divided its - 
