HOLOTRICHA 



561 



P. trichostomum N. (Fig. 267, c-e). About 220^ long; macro nuclei 

 44/u long each; salt water; Florida. 



Genus Spathidioides Brodsky (Spathidiella Kahl). Somewhat 

 similar to Spathidium; but oral ridge highly flattened on ventral 

 side and conspicuously developed into a wart-like swelling on dorsal 

 side; this knob contains trichocysts; sapropelic. 



Fig. 267. a, b, Spathidium spathula, X200 (Woodruff and Spencer); 

 c-e, Paraspathidium trichostomum (c, X130; d, cytostomal region X400; 

 e, part of pellicle, XlOOO) (Noland); f, Spathidioides sidcata, X260 (Brod- 

 sky); g, Enchelydium fusidens, X240 (Kahl); h, Homalozoon vermiculare, 

 X80 (Stokes); i, Cranotheridium taeniatum, X300 (Schewiakoff) ; j, Penar- 

 diella crassa, X210 (Kahl); k, Perispira strephosoma, X280 (Kahl); 

 1, Legendrea bellerophon, Xl90 (Penard). 



S. sulcata B. (Fig. 267, /). 65-85/x long; posterior end pointed, 

 highly flattened; anterior end elevated at one side where cytostome 

 and cytopharynx with 10 rods are located. 



Genus Enchelydium Kahl. Somewhat similar to Spathidium; but 

 oral ridge forms a swollen ring with trichocysts; the ridge circular or 

 elongated in cross-section; when swimming, the organisms appear 

 as if cytostome is opened; with dorsal bristle; fresh water. 



