38 Prot. 
XVIII. PROTOZOA. 
and Colpidia, gradually leading to death. The micronucleus is the last to 
be affected. Conversely, in the reorganizing process (if starvation has not 
been carried too far to allow of this), the nucleus rapidly regains its normal 
condition and faculty for division, Wallengren (408). Nutrition and 
excretion in Stylonichia, pp. 234-238, Prowazek (300). 
Dendrocometes , peculiar among Infusoria, in feeding while conjugating, 
Hickson & Wadsworth (158).—In Choanophrya the food particles are sucked 
into the open funnel of the tentacle while a short distance off, probably by 
means of a diffusion current caused by the secretion of substances of high 
osmotic value ; this is possibly the case in most Suctoria, Hartog (151). 
Osmotic experiments on Infusoria; difference between osmosis and 
absorption, Enriques (102).—Osmotic experiments on Oikomonas and 
Colpidium colpoda , Enriques (101).—Change in volume of various 
Infusorians on transferring them to a medium of different tonicity ; 
Enriques (100).—Attempts to transfer Chilodon and Euplotes from salt- 
to fresh-water, Enriques (103). 
Different types of marine illumination caused by phosphorescence in 
Noctiluca miliaris , Weitlauer (411). 
2. Locomotion, and response to stimuli. 
(a) Movements, etc.:—Amoeboid movement in various Rhizopods ; 
also flagellar and ciliary movement in Infusorians, Prowazek (301). 
Gliding movements in Stenophora juli and Echinomera hispida are of 
two sorts: one, contractile, explainable by the myocyte-layer of the body, 
but the other—the purely gliding one—is due to a cause not thoroughly 
understood. Crawley (73) casts doubt upon SchewiakofFs suggestion 
that progression is by means of extended gelatinous fibres, and substitutes 
a rather complicated one, based on the presence of the well-marked 
muscular layer, and the sticky nature of the animals. He concludes that 
“ in general, throughout the Sporozoa, the possession of muscle-fibres, and 
the power of moving from place to place go hand in hand.”—Rapid 
movement, change of shape and pseudopodial formation in Sphcerospora 
masovica , Cohn (67). 
“Screwing” movement in the spores [i.e. gymnospores] of Sarcosporidia 
of mice (Sarcocystis muris ), Koch (177) and Smith (367). 
(b) Vital processes; chemical stimuli:— 
Although conjugation can be induced by hunger in Stylonichia , 
Prowazek (300) thinks that the principal cause arises from internal 
conditions, whereas cyst-formation is the result of unpropitious external 
circumstances.—Experiments on the continuation of the vital processes 
in enucleated portions of Infusoria , especially on the presence therein of 
free oxygen, and their oxidising capacity, id. (305). 
Action of anti-periodic drugs on the malarial parasite, Lo Monaco & 
Panichi (233 & 234).—Effects of different chemicals on the Trypanosoma 
of Nagana ; serotherapeutic experiments on the same ; arseuious acid and 
human serum appear to have a certain effect on the parasites, Laveran & 
Mesnil (198). 
Influence of anaesthetics on Vorticella microstoma ; protoplasmic altera¬ 
tions, Stefanowska (376).—Effects of: arsenic anhydride and other 
chemicals in dilute solutions on Stylonichia pustulata, Zacharias (427); 
“protoplasmic poisons” on Opalina ranarum , Zahn (435) p. 156; con¬ 
centrated chemical solutions on growth, multiplication, and chromatophore 
formation in different Infusoria and Flagellates, Yasuda (423). Minke- 
vIch (264) reviewing the paper, says that Yasuda has mistaken for 
Mallomonas , a sp. of Cyclidium , a Holotrichan, which much resembles it, 
and infers from this that the paper has no value.—Increase of toxicity 
of eosine and other substances, in strong light, on Paramcecia , Ledoux- 
Lebard (209).—Toxic effects of various blood-sera (from horse, ox, rabbit 
