216 
Is Pedalion a Rotifer ? 
reasons for or against the promotion of the rotifers, they will admit 
that, when Pedalion s six limbs are thrown into the scale, the 
beam decidedly inclines towards the Arthropoda. 
EXPLANATION OF PLATE XXXIII. 
Fig. 1. — Side view of the female of Pedalion mira , showing the internal organs. 
The two side limbs have been removed, as well as all the muscles. 
a , buccal funnel, b, lips, c, gastric glands, d, mastax. e, stomach. 
/, intestine. g, aperture of oviduct, h , anus, ft, loop of depuratory 
tube, with two vibratile tags close adjoining. I, another loop of 
depuratory tube, with one tag. in, nerve mass, n, dorsal antenna, 
with nerve thread. 0 , shoulder antenna, with nerve thread. 
Fig. 2. — The same view of the same to show the muscular system : the plumes of 
the side limbs and all the internal organs removed, a, thinned portion 
of trochal disk, b, b, b, muscles for retracting the disk, c, very long 
ditto, traversing the centre of the body and fastened by two branches 
to the centre of the trochal disk, d, e, muscle for opening oviduct. 
g, aperture of oviduct. 
For full description and figures of the rest of the muscles, see 
the October number of the ‘Quarterly Microscopical Journal’ for 
1872. 
The figures, however, given in that number, as well as those 
accompanying this paper, are rather diagrams than drawings. For 
drawings giving the best representation of Pedalion s appearance, 
see the sixth volume of the ‘ Monthly Microscopical Journal,’ 
page 121. 
