81 (78) Stalk at least as long as body. Family CHILODOCHONIDAE. 



81 (78) Stalk less than one-fourth length of body or absent 82 



82 (81) Apical funnel in 3 spirals. Family SPIROCHONIDAE. 



82 (81) Apical funnel single or double, and not spiraled. Family STYLOCHONIDAE. 



83 (54) Cilia restricted to ventral surface. Dorsal surface non- 

 ciliated, with cilia only at borders, or with sparse rows 

 or groups of cilia not used in locomotion. (These dia- 

 grams show cross sections of animals) 



84 



83 (54) Cilia not restricted to one surface, in cir- 

 clets, parallel oblique rows, isolated groups 

 of rows, or some other arrangement 



104 



31 



