22 General Morphology o£ the Protozoa 



Fig. 1. 13. A. Myonemes in anterior half of Stentor coeruleus; dia- 

 grammatic (after Dierks). B. Portion of a myoneme (S. coeruleus) showing 

 cross-striations; diagrammatic (after Dierks). C. A neuroneme in Para- 

 mecium; diagrammatic (after Gelei). D-E. Myonemes in Monocystis agilis, 

 longitudinal and transverse sections; diagrammatic (after Roskin and 

 Levinson). F. Sensory bristle of Euplotes patella; diagrammatic (after 

 Hammond). G. Neuromotor system of Euplotes (patella) eurystomum, 

 showing major fibrils and incisions made in microdissection; x680 (after 

 Taylor). Key: c, cilium; cf, anal-cirrus fibril; cm, circular myoneme; g, 

 basal granule; Ic, longitudinal canal containing myoneme; Im, longitudinal 

 myoneme; m, motorium; /«/, fibril to membranelles; n. neuroneme; p, 

 pellicle; r, rodlet of "rosette"; s, "sensory" fibril; t, trichocyst; tg, tricho- 

 cyst-granule; 1-5, approximate planes of incisions in Taylor's operations. 



