SYNOPSIS OF THE FAMILIES AND GENERA. 



* Polypidoms calcareous ; the cells tubular with a round terminal 

 aperture uncovered with an operculum. TUBULIPOBINA. 



Family TUBULIPORID^E. Polypidovis multiform, massive or 

 crustaceoiis. 



TUBULIPOEA. Polypidom wart-like with a defined base, the cells 

 suberect, aggregated or imperfectly rowed. 



DIASTOPOBA. Polypidom crustaceous, undefined, the cells hori- 

 zontal, semialternate. 



PUSTULIPORA. Polypidom erect, branched, the cells opening all 

 round, semialternate or irregular. 



IDMONEA. Polypidom dichotomous, the segments free, the cells in 

 alternating cross-rows on one surface. 



ALECTO. Polypidom creeping, adherent and ramous, the cells in 

 one or more series. 



Family CRISIADJD. Polypidoms confervoid, jointed. 

 CRISIADA. Polype-cells uniserial. 

 CBISIA. Polype-cells biserial 



* * Polypidoms calcareous or membrane-calcareous, multiform, com- 



posed of oblong or oviform cells, whose subterminal aperture is 

 closed by a membranous fold or operculum. CELLEPOBINA. 



Family EUCRATIAILE. Polypidoms branclied in a confer- 

 void manner ; cells oblong ; no ovarian capsules. 



t The Polypidoms erect. 



EUCBATEA. Cells produced in a single linear series. 

 GEMELLABIA. Cells geminate. 



t t The polypidoms creeping, adnate. 

 HIPPOTHOA. Cells linked, anastomosing. 

 ANGUINABIA. Cells scattered, erect. 



Family CELLEPORIDJE. Polypidoms massive or crustaceous, 

 composed of ovate cells in juxta-position, the aperture terminal, often 

 furnished tvitk a globular capsule. 



CELLEPOBA. Polypidom lobed or ramous ; cells heaped. 



LEPBALIA. Polypidom crustaceous ; cells in a single layer. 



MEMBBANIPOBA. Polypidom crustaceous ; cells quincuncial. 



