CONTRlP.rTIONS TO THE CYTOLOGY OF THE JJACTEKIA. o03 



a double form, with one nucleus (upper) appearing as a solid mass of 

 chromatin, the other (lower) as a vesicular structure with a large karjo- 

 sonie. (-iO per cent, formol. drop metlii>d. alisolute alcohol : Giemsa's 

 stain.) 



Fig. 68. — " Fusiform Bacterium "' (double form) I'rom large intestine 

 of Lacerta muralis. Each individual possesses a small spherical 

 nucleus. (Dry film, absolute alcohol ; Giemsa's stain.) 



Figs. 69-78. — Bacilli from large intestine of Mabiiia carinata. 

 (Osmic acid 1 per cent., droii method; Leishman"s stain). 



Fig. 69. — Long slender Bacillus with nucleus of spirogjra type. 



Figs. 70-73. — Smaller Bacilli of spirogyra type. Diverse forms and 

 sizes. 



Fig. 74. — Very small Bacillus witli tliick nuclear filament of spiro- 

 gyra type. 



Fig. 75. — A Bacillus, similar to that shown in fig. 7i*, undergoing 

 fission. 



Fig 76. — Slender Bacillus with nucleus of chromidial type. 



Fig. 77. — Slender Bacillus with large central nuclear mass (possibly a 

 plasmolysed form P). 



Fig. 78. — Bacillus with nucleus in the form of a shoi-t. irregular, and 

 slightly bent rod-like filament. 



Figs. 79-82. — Bacilli of modified flexilis form from large intestine of 

 Triton vulgaris. (40 i^er cent, formol, absolute alcohol; Giemsa's 

 stain.) 



Fig. 79. — Bacillus of flexilis form, with chromidial nucleus. 



Fig. 80 — Individual with finely granular, darkly staining cytoplasm, 

 and large nucleus-like masses of chromatin, eight in numlier. 



Fig. 81. — Long, sporiUating individual, bearing a large chromatin 

 spore-rudiment at each end. (The organisui is normally disporic. like 

 B. flexilis.) 



Fig. 82. — Long individiial similar to that shown in fig. S(i. The 

 cytoplasm is alveolar, and the chromatin in the foi-m of large nucleus- 

 like masses. 



Figs. 83, 84. — Long and short individuals respectively of Bacillus of 

 flexilis type from large intestine of Lacerta muralis. Nuclei of 

 chromidial form. (Osmic vapour [wet film], absolute alcohol; Giemsa's 

 stain.) 



