BIOLOGY, PHYSIOLOGY. 
PrOt. 37 
Consideration of the various kinds of the nuclear organollce known as 
chromidia ; distinction between “ trophochromidia” and “ idiOchromidia” ; 
nuclear dimorphism ; the diffuse nucleus, Mesnil (294). 
On the changes in the structure and behaviour of the karyosome in 
Caryotropha during growth ; its significance as a vegetative organella, 
which amasses a reserve Supply of chromatin, to be given back later to the 
nucleus ; comparison with other Protozoa, Siedlecki (444). 
Trophic nuclear changes in Amoeba dofieini n. sp. ; formation of nucleoli, 
chromidial bodies and curious crystals, Neresheimer (312). — Nuclear 
structure (of the “distributed ” Bacterial type) in the [so-called] Trypano- 
some of oysters (“T 7 .” balbianii ), Perrin (345). — Minute structure of the 
meganucleus of Vorticella microstoma , FaurIs-Fremiet (132^. 
Description of the nuclear apparatus and its resolution, prior to multi- 
plication, into chromidial substance (network) in certain parasitio Infusoria 
(Opalinopsis and Chromidina n. g.), Gonder (160). 
Occurrence of a rudimeritary cytostome in Chromidina , Gonder (160).— 
Description of the complicated cytopharyrtgeal apparatus for seizing and 
injesting food (Infusorians) in Didinium, Thon (491). 
Two contractile vacuoles ir “ T ' ntractile one and one 
secreted (?) by the cytoplasm, around the food-vacuoles in Infusoria* 
Faur^-Fremiet (131). 
Trophoplasmic spherules in the endoplasm of Opalina , probably to be 
considered as a secretory apparatus, Kunstler & Gineste (225). 
The refringent-bodies of Pelomyxa ; their relation, on the one hand, to 
the whole animal (probably an albuminous waste-product) and on the 
other, to the symbiotic Bacterial rods (as a necessary point of attachment 
and nutritive source), Veley (496). 
Nature and structure of the trichocysts of Infusoria, SchubeRG (419). 
Presence of eye-spots (stigmata) in Ceratium, Zacharias (517). 
(c) Organellae of attachment and movement:— , 
Organ of attachment (“vesicle of adhesion”) of Anchorina sagittatd 
described, Cecconi (76). — On the intimate structure of the fixative ap- 
paratus of Vorticellidce, Faur^-FremiEt (137); 
Two kinds of pseudopodium : long, narrow ones at the hinder end, and 
short, lobose ones around the body generally, in Amoeba salina, n. sp.* Ham-* 
burger (172). — Remarks on the pseudopodia of Pelomyxa, Veley (496). — 
Varieties of pseudopodia in Cochliopodium pellucidum , FauR^-Fremiet 
(129 & 138). 
Detailed description of the cilia of various Infusoria ( Stentor , Paramce- 
cium, Frontonia) ; their morphological comparison with flagella, Sohuberg 
(419). — Basal corpuscles, cilia, myonemes etc., in Cryptochilum , Russo & 
di Mauro (390). 
Regulation in behaviour in response to changes in conditions, in Pro- 
tozoa, Jennings (196). 
Rapid rate of growth in Epistylis Jlavicans (after attachment of the 
young individual) measured, Landacre (226). 
Reflections on “recuperation” in Protozoa ; the part played by protective 
cysts (hypnocysts) in connection with dedifferentiation and a return to 
embryonal conditions, Schultz (428). 
Cyclical changes in the life-history of different Infusoria ( Gastrostyla , 
Oxytricha and Pleurotricha )* periods of renewed vital activity alternating 
with periods of depression, as measured by the division-rate ; effects on 
food vacuole, Schouteden 
delicate membrane, 
B. Physiology. 
