498 ALBERT W. BROWN. 



Fig. 3. — (a) Surface view of integument, showing dots caused by ends of 

 canals. 

 (d) Section of cuticle, showing minute canals. 



Fig. 4. — Camera drawing of a horizontal section, to show tubules connecting 

 j^land-cells with the lateral adhesive organs. 



Fig. 5. — Diagram to show arrangement of the gland-cells of the lateral 

 adhesive organs. 



Fig. 6. — Horizontal section, showing retractor muscles of the lateral 

 adhesive organs. 



Pig. 7. — Semi-diagrammatic view of the coarser ventral portion of the 

 excretory system. Terminal vesicles and finer tubules shown only on the 

 right side of the figure. 



Fig. 8. — More highly magnified part of the excretory system, to show the 

 terminal vesicles and calcareous bodies contained in them. 



Fig. 9. — Four calcareous bodies. 



Fig. ]0. — Longitudinal vertical section, to show the greater number of 

 nuclei in the posterior region of the body. Leitz, oc. 1, obj. 7- 



T'ig. 11. — Schematic plan — combined from several horizontal sections — of 

 the chief organs of the bodies. 



