Dr. W.M. Dobie on two new species of Floscularia. 235 
my opinion to the peculiar serpentine movement always observed 
at this point. See fig. 3d. 
The cilia on the upper surface of this diaphragm and on the 
edges of its aperture assist in carrying the food into the crop. 
In both species the crop is ciliated throughout its interior. 
The next cavity, or second cesophageal bulb, contains the jaws 
and teeth—communicating above with the crop, and below with 
the conical termination of the alimentary tube. The teeth and 
jaws seem exactly alike in both the species I have examined with 
care: each jaw contains a bifurcated tooth, greatly resembling 
that of the Stephanoceros, only much more minute. See figs. 3, 
4 & 5. 
The ovigerous sac or ovary is large in both, containing several 
large ova which seem to be discharged from the cloaca, which is 
common to both the ovary and the alimentary canal. The red 
points can be seen in the egg before it is discharged ; the move- 
ments of the young animal within its case are quite perceptible 
at this period. See figs.6 & 3A. 
The eggs for some time before they are completely hatched 
remain about the bottom of the case. I have been unable to 
detect any male organs in either of the species. 
The tail is long, and composed of non-striated muscular fibre 
inclosed in a continuation of the general integument. In the 
Floscularia campanulata it terminates in a homogeneous non-con- 
tractile filament produced into a sucker-like expansion, by which 
the animal attaches itself to Confervee or Ceratophyllum. 
The muscular system consists of non-striated fibres. Those 
composing the tail extend upwards and are lost upon the surface 
of the body. In the F. campanulata five very distinct bands run 
up the sides of the vestibule and infundibulum, and terminate by 
bifurcating in the depression between the lobes. The body and 
tail are highly contractile; the vestibule particularly so, large 
animalcules being frequently forced through the aperture leading 
into the crop by the powerful and continued contractions of its 
walls. 
No trace of a vascular system can be observed. The tremu- 
lous gill-like organs found in some Rotifers are here absent. 
With the exception of the eye-spots in the young animal, there 
are no organs of special sense. The whole surface is acutely sen- 
sible of tactile impressions, but the lobes of the rotatory organ and 
the cornu are perhaps more sensitive than the general surface. 
The cilia on these animals are of two kinds: the usual short 
vibratile kind line the interior of the crop and alimentary canal, 
and cover the lower part of the vestibule. The other variety of 
cilia are extremely long and filiform, of uniform thickness, and 
not vibratile under ordinary circumstances. They are slowly 
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