HOLOTRICHA 



741 



(1930) observed this ciliate in salt water cultures in California and 

 found it to be 70-1 14^ by 31-56/* by 22-37/x. 



P. minuta Powers (Fig. 315, b). 50-75/x by 36-46/x; in the intestine 

 of Strongylocentrohis droebachiensis ; the Bay of Fundy (Powers, 

 1933). 



Genus Lechriopyla Lynch. Similar to Plagiopyla; but with a large 

 internal organella, furcula, embracing the vestibule from right, and 

 a large crescentic motorium at left end of peristome; in the intestine 

 of sea-urchins. 



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m 



Fig. 315. a, Plagiopyla nasuta, X340 (Kahl); b, P. minuta, X400 

 (Powers); c, Lechriopyla mystax, X340 (Lynch); d, Sonderia pharyngea, 

 X590 (Kirby); e, S. vorax, X310 (Kahl); f, Glathrostoma viminale, X220 

 (Penard); g, Physalophrya spumosa, X160 (Penard). 



L. mystax L. (Fig. 315, c). 113-174/x long; in the gut of Stro?igylo- 

 centrotus purpuratus and S. franciscanus; California. 



Genus Sonderia Kahl. Similar to Plagiopyla in general appear- 

 ance; ellipsoid; flattened; peristome small and varied; body covered 

 by 2-4/i thick gelatinous envelope which regulates osmosis, since no 



