Chapter 34 

 Order 1 Holotricha Stein (continued) 



Suborder 3 Trichostomata Biitschli 



With gelatinous lorica; swimming backward 



Family 1 Marynidae (p. 738) 



Without lorica 



Compressed, armor-like pellicle; ciliation sparse, mainly on flat right 

 side in 2-9 broken rows on semicircular or crescentic keel; cy- 

 tostome on flattened ventral surface, with an obscure membrane. 



Family 2 Trichopelmidae (p. 739) 



Body form and ciliation otherwise 



With a long caudal cilium; cilia in 3-4 spiral rows on anterior half, 



very small forms Family 3 Trimyemidae (p. 739) 



Without a caudal cilium; form and ciliation otherwise 



With a spiral zone of special cilia, from cytostome to posterior end 



Spiral zone extends from anterior right to posterior left 



Family 4 Spirozonidae (p. 740) 



Spiral zone extends from anterior left to posterior right 



Family 5 Trichospiridae (p. 740) 



Without a spiral zone of special cilia 



Ciliated cross-furrow in anterior 1/5 on ventral surface, leads 



to cytostome Family 6 Plagiopylidae (p. 740) 



Without ciliated cross-furrow 



Cytostome in flat oval groove with heavily ciliated ridge in 



anterior 1/4 Family 7 Clathrostomidae (p. 742) 



Cj'tostome funnel-like, deeply situated 



Cytostomal funnel with strong cilia; peristome from an- 

 terior left to posterior right 



Family 8 Parameciidae (p. 742) 



Without such a peristome 



Free-living; oral funnel deep; cilia at bottom and top. . 



Family 9 Colpodidae (p. 745) 



Endozoic 



Commensal in vertebrates 



Family 10 Entorhipidiidae (p.748 ) 



Parasitic in vertebrates 

 Ciliation uniform 



With concrement vacuoles 



Family 11 Paraisotrichidae (p. 750) 



Without such vacuoles 



Family 12 Isotrichidae (p. 751) 



Ciliation not uniform 



Cytostome occupies the entire anterior end; cilia 



only in anterior region 



Family 13 Cyathodiniidae (p. 752) 



Cytostome not terminal; tufts of cilia above and 

 below cytostome and in posterior region. . . . 

 Family 14 Blepharocoridae (p. 752) 



737 



