PROTOPLASM AND THE CELL. Gen. Stlb. 65 
of nucleus in secretory processes ; Trambusti (696).— Disappearance of 
nuclei in Mammalian erythroblasts ; Albrecht (3). 
Centrosomes and attraction sphere : recent work ; Flemming (203). 
— Consideration of centrosomes in general ; Boveri (61). — The centro- 
some is an independent and permanent organ of the cell. It dividf s into 
two : dynamic centres for the daughter cells. Centrosomes usually lie in 
the cytoplasm, but may be intra-nuclear ; Boveri (61).— On the central 
corpuscle ; Prenant (535). — Centrosome and central spindle; HertWig, 
R. (306). — Attractive sphere in fixed cells of the connective tissue of the 
liver and gonad of PalucHna vivipara ; it is a mass near the nucleus, and 
the centre of a plexus of filaments radiating out into the cytoplasm ; DE 
Bruyne (82). — Centrosome and attraction sphere in the maturation of 
spermatozoa and ova; Rawitz ( 562). — In sea-urchin ovum; Wilson 
(760). — Centrosomes in developing ova of Teleosteans ; Raffaele (546). 
— Central corpuscles in embryonic red-blood cells of chick ;Dehler (142). 
— Secure proof of the occurrence of ceutrosomes in nerve-cells, i.e ., in 
cells which have long since ceased to divide. In spinal ganglion-cells of 
the frog ; von Leniiossek (388). — Denial of Heidenhain’s conclusion 
that every centrosome comes from a centrosome. The centrosome is 
the insertion centre of the protoplasmic fibrils; Niessing (401). — Nucleolus 
and centrosome homologous ; Balbiani (17). — Quadrille of the centres ; 
Wilson & Mathews (762). — Refusal to regard Fol’s statements as to a 
quadrille of the centres as disproved ; Reinke (572). — A specific archo- 
plasm composes the astrosphere, but it is no permanent structure, merely 
that transitory complex of rays which is centered around the centrosome; 
Boveri (61). — Centrosomes in fertilised egg of Myzostoma glabrum ; 
Wheeler (749). — Central-corpuscle groups and centered structure of 
cytoplasm demonstrated in sympathetic gauglion cells of frog. Thus a 
corroboration of von Lenhossek. — Also a suggestion as to the existence 
of motor and sensory nerve-cells in sympathetic ganglia ; Dehler (143). 
— Centrosome and attraction sphere in the resting-cell of Salamauder’s 
testes ; Rawitz (562). — Centrosomes and spheres in resting cells ; vom 
Rath (555). — Attractive sphere in pigment-cells of the cat’s eye ; Van 
der Stricht (677). — Ovum centrosome in A scans megalocephala ; Sala 
(615). — Behaviour of centrosomes in fertilisation of Echinoderm ovum ; 
Boveri (61). — The astrosphere is a mere region, a fibrillar system with 
special material in the intcrfilar spaces; Niessing (401). — Origin of attrac- 
tive spheres; Guignard (263). — Paranuclear body in nucleated erythro- 
cytes of Fishes, Amphibians, Reptiles, and Birds. It lies near nucleus, from 
which it seems to arise ; is spherical and only stainable in a minute 
central point ; Bremer (70, 71). — Origin of the centrosome ; Watase 
(734a). 
d. Cell-Division. 
Mitosis in Protozoa , plants, and Metazoa : summary of recent work j 
Flemming (203). — Karyokinesis : general account; Wilson (759). — 
General ; Ziegler (772), McMurricii (419a). 
