July, 1923] 
SANDS 
STRUCTURE OF CHROMOSOMES 
355 
dont celle-ci s’y presente est variable. Ici elle remplit entierement son etui; la, dans les 
boyaux volumineux, elle se retire contre la paroi, en laissant ouvert un canal central renfer- 
mant un plasma transparent. 
Terni (1914) has, in many figures, very diagrammatic chromomeres. 
I consider his splitting chromosomes to be a misinterpretation of a chromati¬ 
cally hollow structure. 
Fig. 9. Quadripartite chromosomes of Ascaris. Bonnevie (1908). Fig. 10. Chro¬ 
mosome end views showing quadripartite structure and chromomeres. Nawaschin (1911). 
Fig. 11. Chromosome end views showing chromatin-free centers. Schustow (1913). 
Chambers (1915) working on Disosteira, describes a hollow chromosome 
structure in the living condition. He finds that the chromomeres are 
arranged in such a manner that there results a central achromatic core. 
Wen rich (1916, p. 117) says, in speaking of Vejdovsky’s 1912 publica¬ 
tion: 
