356 C. H. MARTIN. 
feeding shghtly-starved Tokophrya upon Stentor the 
“ Tinctin-korper ” 
trol form, and it is interesting to note that up to this stage 
showed no marked increase over the con- 
the nuclei of the Stentor, although slightly swollen, had not 
been ingested. But in individuals which had ingested the 
nuclei of the prey enormous masses of “ Tinctin-kérper ”’ 
were found resulting in such an appearance as is figured in 
Pl. VIII, fig. 1, in which the whole of the cytoplasm is 
blocked with “ Tinctin-korper.” 
It is remarkable how little attention has been hitherto paid 
to the possible presence of ingested chromatin in Protozoa, 
although it is evident that unless the process of digestion is 
extremely rapid, these ingested masses may quite easily form 
a considerable source of error in the description of the nucleus 
of any holozoic protozoon. 
As far as I am aware the only careful description of the 
appearance and behaviour of ingested chromatin in a Proto- 
zoon is to be found in Schaudinn’s account of Tricho- 
spherium sieboldii. Schaudinn (p. 81) found that in 
Trichospherium the nuclei eight hours after ingestion were 
not greatly changed; in later stages the linin is dissolved, 
and the chromatin sinks to the lower side of the nucleus. 
“ Das Chromatin wird nun auch allmahlich gelost, und nimmt 
hierbei meist Kugelgestalt an. Hs schien mir, als ob hierbei 
seine Farbbarkeit zunimmt was vielleicht darauf beruht, dass 
bei der Verdauung ein nicht farbbarer 'lheil seiner substanz 
friiher gelost wird, wahrend die farbbarer Theilchen dichter 
zusammengedraugt werden und daher in ihrer Gesammtheit 
dunkler gefarbt erscheinen.” 
As regards the details of this process of digestion in 
Acinetaria, the earlier stages are passed through whilst the 
nucleus is still lying in the cytoplasm of its prey. But in the 
early stages of the degeneration of the macronucleus of a 
conjugating form quite analogous early stages of digestion 
are to be found in the cytoplasm of the Acinetarian, 
The later stages of the digestion as figured by Schaudinn 
