PHYSIOLOGY, BIONOMICS. 
Prot. 39 
3. Response to stimuli ; effects of reagents. 
The effects of concentration (and its reverse) of the medium, with regard 
to acidity or alkalinity, upon cliemotaxis in Paramoecium^ Barratt (13). 
Chemotaxis and galvanotaxis of various Protozoa ( Spirostomum , Opalina , 
Balantidium) under different conditions, and the bearing of the results 
obtained upon a theory of the genesis of protoplasmic movement, 
Robertson (380). 
Continuation of his studies on galvanotropism and galvanotaxis in 
different Ciliates, Statkewitsch (467). — Galvanotaxis of Paramoecia in 
various media ; a theory of the action of the electricity on the protoplasm 
in explanation of their behaviour, Coehn & Barratt (90). — Galvanotropic 
reactions of Paramcecium ; validity of Pfliiger’s law for the stimulation of 
the cilia, Bancroft (9 & 10). 
A modification of the “ statocyst ” theory best explains geotropism in 
Paramcecium , Lyon (272). 
Conditions favouring the emission of light-rays (so-called “ phosphor- 
escence ”) by Ceratium tripos ; influence of various chemicals on this 
manifestation, Zacharias (512 & 513). — Behaviour towards light (positive 
heliotropy) of Volvox , Zacharias (514). 
Varying effects of radium on different Protozoa (Rhizopods, Paramcecium 
and Spirostomum ), Zulzer (519). 
The living protoplasm of Paramoecium can enter into combination (to a 
certain extent) with acids and alkalies, Barratt (11). 
Effect of : different chemicals on Amoebae , Musgrave & Clegg (308) ; 
anaesthetics (ether, chloroform and alcohol) on Vorticella, Stefanowska 
(470) ; stimulating an Infusorian ( Gastrostyla ) with different salts, upon 
the rate of division, Woodruff (507). 
Specific sera against Paramoecia and other Infusoria developed in the 
blood ; attempts at immunization, Rossle (388). 
Discussion on the efficacy and expediency of the arsenious acid and 
“ trypanroth ” treatment of different Trypanosomes (including T. gam- 
biense\ Laveran (228, 231 & 232), Brumpt (56), and Brumpt & Wurtz 
(57). — Favourable treatment of various Trypanosomes with an arsenic and 
aniline compound (atoxyl), Thomas (487). 
C. Bionomics. 
1. Plankton. 
Plankton, Bay of Biscay, colloid Radiolaria, Wolfenden (506). 
Ceratia , also Acanthometra } in tow-nettings, Port Erin Bay, Scott (433) ; 
Protozoa in tow-nettings, Irish Soa, id. (434) ; Ceratia in tow-nettings, 
Luce Bay, Johnstone (200).— Rhizopods in plankton, . lochs of N.W. 
Scotland, West (503). — Dinoflagellates in plankton, Danish and Scottish 
lakes, Wesenberg-Lund (502). 
Protozoan plankton from : Icelandic lakes, Ostenfeld & Wesenberg- 
Lund (328) ; North Sea and Zuider Zee, van Breemen (46) ; Norwegian 
fiords (mostly Dinoflagellates and Radiolaria), J0rgensen (203 & 204) ; 
Norwegian coast, Northern Ocean (mostly Dinoflagellates), Hjort & Gran 
(182). 
Protozoan plankton : noted in the Neva, Skorikow (458 & 459) ; from 
different regions of the Volga, Zykoff (520 & 521) ; from Lake Saisan, id. 
(522). 
Peridinida from plankton, Quarnero (Hungary), Entz (122). — Dunaliella 
salina, from saline springs, Cagliari, Hamburger (172). 
Lake Scutari, Albania, Ceratium and Dinobryo?i, in plankton, Brehm & 
Zederbauer (48). 
