HOLOTRICHA 



497 



tip; anterior 1/3 compressed; posterior 2/3 nearly cylindrical; 2 

 oval macronuclei, each with a micronucleus; cytoplasm filled 

 with numerous ref ractile granules (metabolic reserves) ; about 70 

 rows of cilia; contractile vacuole terminal; salt water. One species. 

 P. trichostomum N. (Fig. 229, c-e). About 220^ long; macro- 

 nuclei 44/i long each; salt water; Florida. 



Fig. 229. a, b, Spathidium spathula, X200 (Woodruff and Spencer); 

 c-e, Paraspathidiimi trichostomum (c, Xl30; d, cytostomal region, 

 X400; e, part of pellicle, XlOOO) (Noland); f, Spathidioides sulcata, 

 X260 (Brodsky); g, Enchelydium fusidens, X240 (Kahl); h, Homalo- 

 zoon vermiculare, X80 (Stokes); i, Cranotheridium taeniatum, X300 

 (Schewiakoff); j, PenardieUa crassa, X210 (Kahl); k, Perispira 

 strephosoma, X280 (Kahl); 1, Legendrea bellerophon, Xl90 (Penard). 



Genus Spathidioides Brodsky (Spathidiella Kahl). Somewhat 

 similar to Spathidium; but oral ridge highly flattened on ventral 

 end, and most developed into wart-like swelling on dorsal end; 

 this knob contains trichocysts; sapropelic. 



S. sulcata B. (Fig. 229,/). 65-85/x long; posterior end pointed. 



