506 C. CLIFFORD DOEELL. 



Figs. 135 and 136. — Bucteriinn-like organi^iin from large intestine 

 of Boa constrictor. (Wet film, absolute alcohol; Delafield's 

 liaematoxyliu.) 



Fig. 135. — Bacterioid forms — a chain of four. 



Fig. 136. — Zymoid forms. A free single individual and another, which 

 has formed a b\id. 



PLATE 19. 



[All figures are of the nixcleated Bacterinm-like organism (or its 

 developmental forms) found in the large intestine of Boa constrictor. 

 (Dry film preparations : fixed absolute alcohol, stained Gienisa.)] 



Figs. 137-141, 144. — Bacterioid forms. 



Fig. 142. — Form intermediate between bacterioid and zymoid form. 



Figs. 143 and 145. — Zymoid forms. 



Figs. 146, 147, 149, 150. — Zymoid forms, producing outgrowths. In 

 fig. 150 the outgrowth has divided off as a more or less bacterioid cell. 



Fig. 148. — Four bacterioid forms in a chain — the two middle indi- 

 viduals pi'oducing outgrowths. 



Fig. 151.— A chain composed of both zymoid and bacterioid indi- 

 viduals. 



