Fig. 3. Transverse section through the apical portion of a stenotele. The 

 interlocking stylet arrangement is shown. XI 7,000. 



Fig. 4. Transverse section through the basal region of a stenotele. The 

 160 Angstrom periodicity of the invaginated capsular wall material may be 

 seen. The section also includes a portion of the head of the tubule. X29,000. 



Fig. 5. An enlarged portion of Figure 4. X48,000. 



142 



