12 



POLYZOA. 



TEIBE IL INARTICULATA. 



Cells in one series 



Cells in more than one series : 



Cells opposite, in pairs .... Gemellariadtz. 

 Branches narrow ; cells in two 

 series or more 



Whips or birds' -heads at the 



back Gabereada. 



No whips ; birds'-heads jointed Bicellariada. 

 Expanded, foliaceous, flexible, 



erect fflmtrada. 



Expanded, encrusting, stony ; cells 



horizontal, in quincunx 



Massive, globose, encrusting, or 

 erect, stony ; cells vertical to the 

 common plane, irregularly heaped 



together 



Expanded and leafy, or branch- 

 ing, stony ; cells in the same plane, 

 in quincunx . , Escharada. 



FAMILY I. SCRUPAEIAD^E. 



Scruparia (Oken). Erect, branching; cell liorn- 

 shaped, simple ; aperture obliquely terminal. 

 S. chelata. Fig. 13 ; n.s. and mag. 



