12 



POLYZOA. 



Teibe II. Inaeticulata. 



Cells in one series Scrupariad^B. 



Cells in more tlian one series : — 



Cells opposite, in pairs .... Gemellariada . 

 Branches narrow ; cells in two 

 series or more — 



Whips or birds' -heads at the 



back Caheread^. 



No whips ; birds'-heads j ointed Bicellariada. 

 Expanded, foliaceous, flexible, 



erect Flustradce. 



Expanded, encrusting, stony ; cells 



horizontal, in quincunx Membmniporadce . 



Massive, globose, encrusting, or 

 erect, stony ; cells vertical to the 

 common plane, irregularly heaped 



together Celleporadis. 



Expanded and leafy, or branch- 

 ing, stony ; cells in the same plane, 

 in quincunx . Hscharadce. 



Family I. Scrupariad^. 



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

 shaped, simple ; aperture obliquely terminal. 

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



