THE LEUCO-THIOBACTERIA 



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Genus 3. — Thioploca (Lauterborn), 1907. 



Literature. — Lauterborn (5), 1907; Wislouch (i), 1912; 

 Koppe, 1923 ; Bavendanim, 1924. 



A well-defined genus living in the calcareous mud of 

 shallow marine waters. 



a - KM- b 



Fig. 13. — Thioploca Schmidlei (Lauterborn). x 5000. 



Description of genus. — Colonial motile threads of the 

 Igiatoa type bound together in a com.mon envelope of 

 slimy matter. Each colony has the appearance of a rope of 

 slime, but the individual movements of the contained threads 

 do not result in their separation from the colony. The outer 

 surface of the slime rope is covered with particles of mud and 

 gritty matter, and is constricted at regular intervals (Fig. 13&), 



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