MORPHOLOGY AND TAXONOMY OF THE MASTIGOPHORA 425 



Family 6. Craspedomonadidae Stein. 



5. Individuals not embedded in jelly 6 



Individuals embedded in jelly 8 



(3. Colonies umbellate, attached Genus Codonocladium Stein 



Colonies free-swimming 7 



7. Colonies with individuals attached radially 



Genus Astrosiga S. Kent 

 Colonies band form; individuals side by 

 side Genus Desmarella S. Kent 



8. Collars not enclosed by jelly 9 



Collars enclosed by jelly Genus Phalansterium Cienkowsky 



9. Individuals irregularly distributed in jelly 



Genus Proterospongia S. Kent 

 Individuals radially distributed in jelly 



Genus Sphaeroica Lauterborn 



10. Lorica single 11 



Lorica double Genus Diploeca Ellis 



11. No circlet of marginal spines 12 



With circlet of marginal spines Genus Acanthoeca Ellis 



12. Lorica does not enclose collar and flagellum 13 

 Lorica encloses collar and flagellum 16 



13. Individuals attached 14 



Individuals free-swimming Genus Lagenoeca S. Kent 



14. Lorica delicate, thin 15 



Lorica thick with long neck Genus Pachyoecu Ellis 



15. Collar huge, conspicuous, flagellum tran- 



sient Genus Choanoeca Ellis 



Collar small, inconspicuous Genus Salpingoeca Clark 



16. Lorica with definite constriction above 



collar Genus Diaphanoeca Ellis 



Lorica with constriction below collar 



Genus Stephanoeca Ellis 



17. Individuals without lorica 18 



Individuals with lorica Genus Diplosigopsis France 



18. Both collars arise independently 19 



Collars closely attached at base .... Genus Dicraspedella Ellis 



19. Individuals sessile or with very short stalk 



Genus Diplosiga Frenzel 



Individuals with long stalks Genus Codonosigopsis Senn 



Family 7. Amphimonadidae. 



1. Individuals solitary 2 



Individuals colonial, in jelly 7 



2. Individuals naked 3 



Individuals in cup Genus Diplomita S. Kent 



3. Body not spirally twisted 4 



Body spirally twisted Genus Spiromonas Perty 



4. Form spherical, ovoid, or spindle-shape 



Genus Amphimonas Dujardin 

 Form not spherical, ovoid, or spindle-shape 5 



5. Form ear-shape, ectoparasitic on fish 



Genus Costia Leclerque 

 Forms diverse — not ectoparasitic 6 



6. Form horseshoe-shape Genus Furcilla Stokes 



Form heart-shape Genus Streptomonas Klebs 



7. Colonies irregular gelatinous masses. Genus Spongomonas Stein 

 Colonies branched or tubular 8 



