PROCEEDINGS OF THE SOCIETY. 
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a large extent compressed they frequently assumed a very remarkable 
tissue-like appearance. When looked at with a low power only, the 
whole thing looked very much like an organic tissue. If they then put 
glycerin between the two glasses and managed the experiment properly 
they would get a kind of cyclosis set up which curiously resembled the 
circulation which was to be observed in plants. This was all. The 
observer of living processes knew that cyclosis might suddenly stop and 
then begin again, or it might stop and then go on in the reverse direc- 
tion ; it was irritable, and was subject to remarkable changes under the 
influence of electricity. In the so-called artificial protoplasm the move- 
ment was all in one direction and it was not susceptible to the same 
influences, but it was sufficiently striking to be worthy of attention, and 
if carefully studied these movements would be found to have a meaning 
which was quite interesting, and might prove of some importance, but 
he could not suppose that any one looking at these forms would regard 
them as in any way allied to living matter. The more intimately they 
became acquainted with them the more sure would they become that 
they were only foams, and that those which appeared under a low 
power to be so much like tissue were under a high power seen to be 
minute bubbles and nothing more. He believed that the movements 
observed would be found to be due to the effect of differences of surface 
tension and that the study of them would no doubt help them to under- 
stand some of the mechanical properties of protoplasm, but they did not 
leave an impression that they had caused an approximation in the least 
degree towards the artificial production of protoplasm in a living state or 
that contained in itself the potentiality of what could become living. 
Mr. It. T. Lewis said he had placed under the Microscope for 
exhibition some specimens of the pupae of a new species of Aleurodes 
which was found upon the leaves of asparagus in Natal. The Aleurodes 
were a family of Homopterous insects which had been described as 
intermediate between the Coccididae and Aphidae. In the adult stage 
they were readily distinguished from either as both sexes were possessed 
of four wings, but in the larval and pupal conditions they were not so 
easy to distinguish. The pupae were generally more or less covered 
with a waxy secretion exuded from numerous pores or tubes, often 
presenting a very ornate appearance. There was only one genus, and the 
species had hitherto chiefly been named from the plants on which they 
were found. It was therefore proposed to call the new species exhibited 
that evening Aleurodes asparagi. As would be seen from an inspection 
of the specimens and of the drawing exhibited, it was an extremely 
pretty object under the Microscope, but at present no complete descrip- 
tion of it was possible, as only the pupa form was yet known. 
The President said this added another form to a very interesting 
family, which were not only remarkable for their elegant appearance, 
but were extremely curious on account of the special glands by which 
this waxy secretion was extruded. 
Mr. T. F. Smith read the following note “On Monochromatic 
Yellow Light in Photomicrography After reading my note on 
this subject at the last meeting in answer to Dr. Piffard’s letter, it 
