430 BOTANICAL GAZETTE [JUNE 
C. moniliferum 
Fic. 17.—Resting nucleus in side view; X 1800. 
Fic. 18.—Resting nucleus in end view; X 1800. 
C. Ehrenbergii 
Fic. 19.—First traces of spireme formation; X 1800. 
Fics. 20, 21.—Later stages of spireme; X 1800. 
Fic. 22.—Detail spireme showing chromatin granules; X 1800. 
C. moniliferum 
Fic. 23.—Spireme; nucleolus breaking up; X 1800. 
C. Ehrenbergit 
Fic. 24.—Chromosomes formed; X 1050. 
Fic. 25.—Metaphase; X 1050. 
Fic. 26.—Detail of metaphase; X 2400. 
Fic. 27.—Anaphase; XK 1050, 
Fic. 28.—Late ana 
Fic. 29.—Telophase: ‘eseine an still showing; 1050. 
Fic. 30.—Telophase; spindle fibers have all disappeared; wall touching 
remains of central spindle; 1050. 
Fics. 31, 32—Telophase; dispireme; nucleoli reappearing in fig. 3?) 
X 2400. 
Fic. 33.—Late telophase; nucleoli fusing to form large masses; % 1050. 
Fic. 34.—Nuclei moving out to surface of chromatophore; both nuclei 
still showing a number of masses of nucleolar material; cell wall not yet 
completed; X to5o. 
C. moniliferum 
Fic. 35.—Late telophase; nuclei reconstructed, but nucleoli not yet 
fused to form a single mass; cell wall beginning; X 1050. 
C. Ehrenbergii 
Fic. 36.—Nucleus in its new position at constriction in chromatophore, 
but latter not yet divided; ‘pp, granular layer; 1050. 
