ABSTEACT AND REVIEW. 



95 







Fig. D. — 1. Two thick-walled mauy. layered cysts, x 620. 2 — 4. Cysts 

 showing the distribution of the nuclei. Chrom-aceto-osmic and haematein- 

 ammouia preparations, x 620. 5. The end of a living cyst treated with 

 methylene blue and pure water, x 5000. 6. Nuclei. Chrom-aceto-osmic 

 and hgemateiu-ammonia preparation, x 10,000. 7 and 8. Chroraatophores, 

 living. X 10,000. 9. Chromatophore. Chrom-aceto-osmic and fuchsin 

 preparation, x 10,000. 10. Living physodes. X 10,000. 



