Plate XIII. Electron micrographs of basal bodies and root 

 connexions of some protozoa. 



(a) Transverse section through a row of basal bodies of 

 Holomastigotoides. The flagellar bases of the spiral row are 

 connected together by a fibrous band which runs on the 

 (animal's) right-hand side of the row. Note also the arrange- 

 ment of the fibril triplets and their interconnexions. From 

 Gibbons and Grimstone (1960). y 70,000. 



{b) Transverse section through several basal bodies of a 

 kinety of Stentor. The root fibrils that are attached to the 

 basal bodies join many similar fibrils to form a large longitudinal 

 bundle. The top of the plate is anterior, and the fibrils run 

 posteriorly from the basal bodies. From Randall and Jackson 

 (1958). ';> 24,000. 



(c) Transverse section through the baeal bodies of a row of 

 cilia of Opalina. Short curved fibrils connect the basal 

 bodies in an asymmetrical way and confer some polarity on the 

 row. From Pitelka (1956). x 23,000. 



