Pomona College, Claremont, California 175 



EXPLANATION OF FIGURES 



Figures 1-3. Cross sections through the superficial radial nerve of an adult serpent 

 star. X350. 

 Figures 2 and 3 do not show the whole breadth, and Fig. 2 shows a little 

 of the deeper more dorsal nerve area. 



Figure 4. Section through the pedal ganglion of an adult. X3 50. 



Figure 5. Section through the circum oral strand of a serpent star of 1mm. disc diam- 

 eter. X350. 



Figure 7. Cross section through the narrowest part of the radial nerve strand of a 

 1 mm. serpent star. 



Figures 8-9. Longitudinal section through the nervous system of the arm of a 1 mm. 

 serpent star. X75. 



Figure 10. Nerve cells from the nerve strands of adult serpent star fixed in Flem- 

 ming's fluid. X700. 



