22 Prot. 
XVIII. PROTOZOA. 
Blochmann (15) describes his observations on the daily movements of 
Pelomyxa , and the effect upon it of light and oxygen. 
Franz£ (63), in a preliminary note on the organization of the Choano- 
fagellata, gives an account of the ingestion of food in Codosiga botnjtis , 
and the structure of collar and digestive vacuole, which differs in various 
points from that given by Biitschli. 
Greenwood (70) describes the constitution and formation of the food- 
vacuoles, and her observations on the processes of digestion in Garchesium 
polypinum. 
Gruber (71) in a popular lecture, “Microscopic Vivisection,” gives an 
account of his experiments on the artificial division of Stentor cceruleus , 
and its power of regeneration. 
Haswell (82) has noticed a parasitic Flagellate, resembling Euglena 
deses, in an undescribed rhabdoccel Turbellariau (from a pond in Victoria 
Park, Sj'dney), producing there a dull yellowish green colour. They were 
found in the iuterior of unicellular glands, or other large cells of the 
parenchyma. No similar occurrence of Flagellata seems to have beeu 
previously recorded. 
Massart( 141) gives an account of his experiments on the irritability 
of Noctiluca, and its reaction to mechanical, physical, and chemical 
influences. 
Sciikwiakoff (205) records his studios on so-called exoretory granules 
of Paramcccium , and some other Protozoa. 
Streng (236) observed Infusoria in the sputum of pulmonary gan- 
grene, and made cultures of the same. 
Verworn (249), in his paper on the movement of living substance, 
comes to the conclusion that the affinity of certain particles of the pro- 
toplasm to the oxygen of the surrounding medium is the cause of the 
formation of Pseudopodia, and of the protoplasmic streaming. 
Verworn (250) made a series of experiments on some marine Badio- 
laria, in order to ascertain how far the organism is affected by the 
removal of certain parts, especially of the central capsule and nucleus ; 
how far regeneration can take place ; and what conclusions can be drawn 
from these experiments as to the physiological significance of the nucleus. 
Wernicke (255) found enormous numbers of parasitic Protozoa , pro- 
bably Coccidia , in the giant-cells of a tumour of the corium ( Mycosis 
fungoides ?). 
Zacharias, (262) p. 124, has found Carchesium polypinum and Epis- 
tylis lacustris floating free in the lake of Plon, in such numbers that they 
could not be supposed to have been torn away from their supports. They 
probably give up periodically their fixed habit in favour of a free-floating 
one, a kind of retrogressive adaptation. 
Zaciiarias (262) discusses the periodicity of the Limnoplankton in the 
lake of Plon (Holstein), and gives the results in a tabular form. 
