368 



PROTOPLASM 



on, 186 ; of muscle cells in 

 relation to contraction, 326 ; 

 arrangement of, producing stria^ 

 tions in ova, 251-253 ; in epi- 

 thelial cells, 254, 255 ; in fibrous 

 protoplasm, 255-257 ; radiate ar- 

 rangement of, 246-253 ; radiate 

 layer of, round nucleus and vacu- 

 oles, see Radiate Layer infra. 



Amoeba Uattce, fibrous structure of 

 protoplasm, 109, 255 ; terricola, 

 radiate appearances round vacuole 

 of, 246, 247 



Amcebce, currents in water surrounding, 

 317-319; Heitzmann's observa- 

 tions on, 163 ; movement of, see 

 Amoeboid Movement ; non-adher- 

 ent, 295, 296 ; structure of, 106- 

 111 



Amoeboid movement, explanation of, 

 307-317; Berthold's views on, 

 290-305 ; Engelmann's theory, 

 276, 277 ; Leydig's theory, 172, 

 280 ; Quincke, 305-307 ; Mont- 

 gomery's hypothesis, 287, 288 ; 

 in foam -drops, 47-54; in foam- 

 drops, under action of electric 

 currents, 58, 59 



Angles in microscopic foams, 23-25 



Annelids, structure of nerves in (Rohde), 

 285-287 



Apathy, criticisms on the foam theory 

 of protoplasm, 149 (footnote) 



Apparatus, optical, used for investigat- 

 ing protoplasm, 86 



Arcella, shell of, 241 



Archoplasm, 248, 249 ; structure of, 

 in Sphcerechinus, 126 



Arnold, observations on ganglion cells, 

 160 ; on reticular structures in 

 protoplasm, 168 



Artificial foams, see Oil-Foam ; light for 

 microscope, 86 



Ascaris lumbricoides, confused fibrous 

 structure in muscles and cells of 

 medullary sacs, 256 



Ascaris megalocepJiala, Boveri's observa- 

 tions on, 248 ; alveolar layer in 

 egg of, 238 ; sexual elements of, 

 173, 182, 252 



Ascidia canina, follicle cells of, 162 



Astacus fluviatilis, ganglion cells of, 

 145 et seq.', structure of chela 

 nerve, 153-156 



Asters in egg of SpJwer echinus, 126 



Attraction-spheres, 248, 249 



Auerbach on blood corpuscles of frog, 

 130 ; views on radiate appear- 

 ances in protoplasm, 258 



Aulastomum gulo, pigment cells of, 143 



Automatic movements of granules in 

 protoplasm, 319-323 



Axial thread in pseudopodia of Actino- 

 sphcerium, 94 ; of M iliolidce, etc., 

 100 



Axis-cylinder, structure of, 148-156 ; 

 fibrous structure of, 256 ; micro- 

 scopic image of, 180 



BACILLAR lining of cells from intestine 

 of Distvnium, 139, 140 



Bacteria and granules, Altmann's views, 

 199-201 ; Martin's views, 193 ; 

 structure of, 117-122 



Bacterium lineola, central body of, 

 visible in life, 121 



Bacteroids in ectoplasm of Epistylis 

 and fat bodies of Periplaneta, 

 201 ; bodies like, in ciliated cells 

 of Hydatina, 133 



Barbus Jiuviatilis, ovarian ova of, 

 127 



Benzin and soap solution, foam pro- 

 duced from, 6 



Berthold, desolution processes, 15 ; on 

 the fluid nature of protoplasm, 

 224 ; on granular movements, 320 ; 

 on the nature of protoplasm, 202, 

 203 ; on streamings in plant cells 

 and amoeboid movement, 290- 

 305 



Blatta orientalis, see Periplaneta 



Blood corpuscles (white) of Amphibia, 

 (Schafer), 282; (red) of frog, 

 127-131 ; Frommann's observa- 

 tions on, 164 



Bodies in endoplasm of Ciliata, 89, 

 90 



Border, striated alveolar, see Alveolar 

 Layer 



Bourne on Pelomyxa viridis, 311 

 (footnote) 



Boveri on fibrillse in the aster and 

 radiate appearances in protoplasm, 

 261 ; observations on eggs of 

 Ascaris, 248 



Branchiobdella astaci, structure of cells 

 from, 136, 137 ; cuticle of, 137, 

 241 



Brass on reticular structures, 194 



Briicke on the contractile framework 

 of protoplasm, 268 ; on the "or- 

 ganisation " of protoplasm, 220, 

 221 



Brush electrodes, use of, 55 



Bursaria truncatella, alveolar layer of, 

 238 



CALF, capillaries of, 143, 144 ; ganglion 

 cells of, 145 et seq. 



