COMPENDIUM OF GENERIC DISTINCTIONS. 



737 



Order. INFUNDIBULATA. 



Sub-order. CHEIL OS TO MA TA .Aperture of cellfilled 

 with thin membranous or chalky veil ; mouth crescent-shaped ; 

 lip movable. 



Family. CATENICELLID^E. Cells connected by flex- 

 ible joints. 



Genus. CATBNICELLA. Cells facing same way ; branches 

 dichotomous ; polyzoary erect ; ovicells below opening of cell 

 in front. Bass s Straits, New Zealand. 



Genus. CALMDIUM. Avicularium on each side of cells; 

 two or more apertures all facing same way ; cells single at 

 dichotomous fork. Bass's Straits. 



family. SALICORNI ARID^E Cells round imaginary 

 axis ; branches cylindrical ; polyzoary dichotomous, erect. 



Genus. SALICOKNARIA. Front of cell depressed, sur- 

 unded by ridge, forming surface of polyzoary into hexagons 

 rhomboids. No apertures. Avicularia irregular. Euro- 

 an and other seas. 



same plane ; 



Family. CELLULARID^E. Cells 

 branches linear, dichotomous, erect. 



Genits CELLULARIA. Cells bi-triserial, oblong or rhom- 

 boidal, contiguous, perforated behind ; no avicularium, seldom 

 vibraculum. Britain, etc. 



Genus. MENIPEA. Sessile avicularia on front of cell below 

 aperture. Britain, etc. 



Genus. SCRUPOCELLARIA. Cells rhomboidal. Sessile 

 avicularium on each cell. Aperture oval. Britain, etc. 



Genus. CANDA. No sessile avicularium ; rest like Scrupo- 

 cellaria. Britain, etc. 



Section. Polyzoary continuous. 



Family. SCRUPARIAD^E. Cells in single series. Joints 

 not flexible. 



Genus. SCRUPARIA. Cells decumbent; aperture oblique 

 near end. Branches from front of cell below aperture. Brit- 

 ain, etc. 



Genus. /ETEA. Cells tubular, erect, from creeping fibre. 

 Britain, etc. 



Genus. BEANIA. Polyzoary horny or chalky. Cells rising 

 from slender tube and open in front ; edges with hollow spines. 

 Britain, etc. 



Family. FARCIMINARIADjE. Cells round imaginary 

 axis, alternate ; polyzoary erect, dichotomous. 



Genus. FARCIMINARIA. Cells homy, flexible ; edge raised; 

 apertures large. Tasmania. 



Family. GEMELLARIAD/E. Cells opposite, in pairs. 



Genus. GEMELLARIA. Cells back to back, pairs facing 

 same way; aperture oval, oblique. Britain, etc. 



Genus. DIMETOPIA. Cells back to back ; pairs at right 

 angles. Bass's Straits. 



Genus. NOTAMIA. Avicularia tobacco-pipe-shaped above 

 each pair of cells. Britain. 



Family. CABEREAD/E. Polyzoary dichotomous ; vi- 

 bracula or sessile avicularia one to several cells. 



Genus. CABEREA. Vibracula large, on back of branches. 

 Algoa Bay, etc. 



Family. BICELLARI AD JS.. Vibracula none. Polyzoary 

 dichotomous. 



Genus. BICELLARI A. Cells distinct ; aperture upwards ; 

 several spines. Britain, etc. 



Genus. BUGULA. Cells elliptical, contiguous ; aperture 

 large. Britain, etc. 



Family. FLUSTRADjE. Polyzoary flat, flexible, leafy, 

 erect. Cells many. 



Gent's. FLUSTRA. Cells contiguous, both sides of frond. 

 Britain, etc. 



Genus. CARBASEA. Cells contiguous, one side of frond. 

 Britain, etc. 



Genus. DIACHORIS. Cells separate, each connected with 

 six others by tubular processes. Bass's Straits. 



Family. MEMBRANIPORID/E. Polyzoary flat, chalky, 

 mostly encrusting. Cells horizontal. 



Genus. MEMBRANIPORA. Cells irregular or quincuncial, 

 with raised margins ; part of front membranous and flexible. 

 Britain, etc. 



Genus. LEPRALIA. Poly/.oary encrusting, spreading from 

 centre. Britain, etc. 



: Family. CELLEPORID.*. Cells vertical to axis or 

 plane, heaped or irregular. 



Genus. CBLLBPORA. Polyzoary chalky, rigid, heaped or 

 quincuncial. Ascending beak or mouth, with avicularium. 



family. ESCHARID^E. Polyzoary erect ; cells quincun- 

 cial in same plane. 



Genus. EsCHARA. Cells on both surfaces, back to back, 

 horizontal to plane of axis. Britain, etc. 



Genus. RETEPORA. Polyzoary leafy, chalky, net-like. 

 Cells immersed, open on surface. 



Family. SELENARIAD.E. Polyzoary flat and rounded, 

 plano-convex or concave. Vibracula large and strong. 



Genus. CUPULARIA. Each cell with vibraculum at apex. 

 Warm seas. 



Genus. LUNULITES. Cells in series from middle, bifurcat- 

 ing ; vibracula in alternate lines. Warm seas. 



Genus. SELENARIA. Certain cells with vibracula. Bass's 

 Straits. 



Sub-order. CYCLOSTOMA TA. Cell with round simple 

 orifice. 



Family. CERISIADjE. Polyzoary plant-like, jointed 

 and branched. Cells tubular, in one or two series ; orifices in 

 opposite directions. 



Genus. CERISIA. Cells in two rows ; orifices at tips. 



Family. TUBULIPORAD^E. Polyzoary solid, chalky, 

 circular, lobed or two-branched. Cells tubular ; orifice round 

 and prominent. 



Genus. PUSTULOPORA. Erect, cylindrical ; cells half 

 sunken ; orifice prominent. 



Genus. ID.MONEA. Erect, two-branched. Cells on one 

 side, in rows, divided by a longitudinal line. 



Genus. DISCOPORA. Base thin, sessile and cup-shaped. 



Genus. ALBCTO. Creeping, branched irregularly. Cells 

 horizontal, in one or more rows ; ends free. 



Genus. TUBULIPORA. Base defined, branch-like. Cells 

 nearly erect, aggregate or in imperfect rows. 



Family. VESICULARIADjE. Polyzoary plant-like, 

 horny, tubular ; cells free, exteriorly flexible. 



Genus. BOWBRBANKIA. Mottled and creeping, or erect 

 and branched irregularly. Cells thickly clustered. Animals 

 eight to ten tentacles. 



Genus. SERIALARIA. Cells aggregated in sets, on a stalk 

 and on same side ; animals with eight tentacles. 



Genus. BUSKIA. Cells nearly separate, on footstalks, and 

 flask-shaped, with short processes from walls. 



Family. ALCYONIDIAD^E. Polyzoary spongy, irregu- 

 lar ; orifice of cells contractile. 



Genus. ALCYONIDIUM. Polyzoary erect, lobed or simple. 

 Cells sunken and five-angled. 



Family. PEDICELLINAD./E. Polyzoary plant-like, 

 creeping, adherent, from which spring polypes on footstalks. 



Genus. PEDICELLINA. Animal globular. Tentacles curled 

 inwardly, not retractile. 



Order. PHYLACTOIJEMATA. Lophophore bilateral; 

 mouth with epistome. 



Sub-order. LOPHOPEA. Arms of lophophore free. 



Family. CRISTATELLIDjE. Polyzoary free and loco- 

 motive. 



Genus. CRISTATBLLA. Only genus. 



Family. PLUMATELLID^E. Polyzoary rooted. 



Sub-family. Lophophore with two long arms. 



Genus. LOHHOPUS. Polyzoary bag-shaped ; ectocyst gelat- 

 inous; statoblasts oval ; no spines. Britain, etc. 



Genus. PECTIN ATELLA. Polyzoary massive; ectocyst 

 gelatinous; statoblasts disc-shaped, with spines. Britain, etc. 



Genus. ALCYONELLA. Polyzoary tubular, tubes united ; 

 ectocyst membranous. Britain, etc. 



Genus. PLUMATBLLA. Polyzoary tubular, tubes distinct. 

 Britain, etc. 



Sub-family. Arms of lophophore nearly funnel-shaped. 

 Genus. FREDBRICELLA. Only genus. 



