A. E. Verrill on a new species of Entozoa. 223 
tions of oxygen je Ayes oi ig electrization ; while the ratio 
of the two present, is unkno 
Finally, Meissner takes nd ‘the question of the electrizing of 
confined oxygen. He finds that the limit of the production of 
ozone is nearly reached in the first 10 to 20. nines that on 
cent, corespontin ing to rt z, instead of ;'; as obtained fe Andires 
and Tai 
ozone to common oxygen, increases in activity with the density 
with the a of electrized oxygen, and, in a given appa- 
ratus, wi i 
character of the Ricyaasiep so that for every apparatus there is 
a limit to the production of ozone, beyond Thich, if the tension 
be increased and the glass be not broken, the ozone and ant- 
ozone rapidly disappear. If the oxygen be dry, it retains its 
diminished volume for many days; but if moist, much less 
electrized oxygen is produced, an an disappears entirely i in the 
course of two days. Mercury ia 2 to have a specific 
action in destroying electrized sayin 
This second research of Dr. Meissner, though not as startling 
in its results as the first, is yet quite as valuable a contribution 
to science. He has s fully established the main positions taken 
in 1863, and it cannot longer be doubted that electrized oxygen 
contains two modifications of this element. bearing of 
this fact upon our theories of ozone is evident. 
ART, ie of Sclerostoma uicola, a new species 
of Entozoa, from the Hog ;* by RE VERRILL. i 
ra two occasions A have received specimens of a rather 
ite, from the fatty portion of a spare-rib; in the 
nd Extractel from ‘“‘ The External and Internal Parasites of Man and Domestic’ 
Animals;” by A. E. Verrill, page 138, figure 89a, July, 1870. : 
