61 (60) Lorica firm, with or without collar. Aboral end may have a horn or 

 be pointed. Family CODONELLIDAE. 



62 (57) Collar with 1 or 2 rows of holes. 

 Family DICTYOCYSTIDAE. 



Lorica semispherical or oval. 



62 (57) Collar without holes. Lorica sometimes pointed posteriorly. 



63 



63 (62) Reticulum ending anteriorly in free, clearly differentiated lines. 

 Lorica acorn-shaped, with blunt, pointed or horned aboral end. 

 Wall thin and hyaline, deeply reticulated. Family EPIPLO- 

 CYLIDIDAE. 



63 {62) Anteriorly just as reticulated as rest of lorica 64 





64 {63) Collar flared, set off by constriction. Oral edge slightly toothed or wavy. 

 Lorica acorn-shaped, with posterior point. Family CYTTAROCYLIDIDAE. 



64 {63) No flared collar. Oral edge with or without teeth. Lorica kettle-shaped or 

 chalice-shaped 



65 



25 



