Plate XIII. 



Fig 1. — Daemonelix as found weathered out. 



Fig. 2. — Section across the same, as indicated by dotted line, showing 



white wall and lesser and greater tubes. 

 Fig. 3. — A section cut from the thickened wall of Fig. 2, showing cells 



in longitudinal section, drawn with camera lucida. 

 [From a specimen in tlie collection of tlie author.] 



