POLYZOA. 267 
Polypidom creeping, adherent and ramous; the cells 
in one or more series. ALECTO. 
Family II. Polypidoms confervoid, jomted. Cristiana. 
Polype-cells uniserial. Crisrp1a. 
Polype-cells biserial. Crista. 
** Polypidoms calcareous or membrano-calcareous, multi- 
form, composed of oblong or oviform cells, whose 
subterminal aperture is closed by a membranous fold 
or operculum. CELLIPORINA. 
Family III. Polypidoms branched in a confervoid man- 
ner; cells oblong; no ovarian capsules. Hucra- 
TIADE. 
+ The polypidom erect. 
Cells produced in a single linear series. HucRATEA. 
Cells geminate. GEMELLARIA. 
++ The polypidoms creeping, adnate. 
Cells linked, anastomosing. H1pporHoa. 
Cells scattered, erect. ANGUINARIA. 
Family IV. Polypidoms massive or crustaceous, com- 
posed of ovate cells in juxtaposition; the aperture 
often furnished with a globular capsule. CELLI- 
PORIDA. 
Polypidom lobed or ramous ; cells heaped. CELLIPoRA. 
