70 



ATLAS OF BIOLOGY. 



FIG. XXXIII. The so-called spore-forming stage in 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 above 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 y^th immersion. 



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

 and Bacillus. 



b. Bud. 



c. Cyst. 



c.f. Contractile fibre, 



c/. Cilium. 



cl'. Posterior ring of cilia 



c.w. Cell-wall. 



d. Disc. 



dt. Ingested diatom. 



eg. Endogonidia (ascospores). 



/. Fat drops. 



f.p. Food particle. 



nc. Nucleus. 



we'. Nucleolus. 



p. Peristome. 



ps. Pseudopodiuru. 



sp. So-called spores. 



sp'. Encysted spore-like masses. 



v. Vacuole. 



v.c. Contractile vacuole. 



v.J. Food vacuole. 



rs. Vestibule. 



