ATLAS OF BIOLOGY. 



FIG. XXXIII. The so-called spore-forming stage iu Spirillum. 



The specimen segmented up as indicated, while being drawn. 



Brefeld (99) gives figures of the germination of the so-called spores of Bacillus, drawn 

 at recorded intervals of time. 



All the ahove Bacteroids were observed in some hay-infusion, allowed to stand two 

 days in a warm room. They are all with the exception of Fig. XXXII. drawn to the 

 same relative scale, as viewed under Gundlach's ^th immersion. 



Dallinger (102) has demonstrated the presence of cilia in the motile stages of Bacterium 

 and Bacillus. 



b. Bud. 



c. Cyst. 



cj. Contractile fibre. 



cl. Cilium. 



d'. Posterior ring of cilia. 



c.w. Cell-wall. 



d. Disc. 



dt. Ingested diatom. 



eg. Endogonidia (ascospores). 



/. Fat drops. 



f.p. Food particle. 



7ic. Nucleus. 



nc'. Nucleolus. 



l>. Peristome. 



ps. Pseudopodium. 



up. So-called spores. 



sji'. Encysted spore-like masses. 



v. Vacuole. 



v.c. Contractile vacuole. 



i'./. Food vacuole. 



rs. Vestibule. 



