409 



POLYPIFERA. 



POLYPIFERA. 



410 



Second Tribe. E.rplanarince. 



Visceral chamber presenting at least six equally developed principal 

 septa. % 



Gen. Explanaria, Astreopora. 



Family 7. Poritidce. 

 Corallum entirely composed of reticulate sclerenchyma. 



First Tribe. PorUince. 

 Cosnenchyma rudimentary or not existing. 



Gen. Porites, Litharcea, Coicinarcea, Microiolena, Goniopora, R/io- 

 dartea, Poraraa, Holarcea. 



Second Tribe. Montiporince. 

 Co3nenchyma abundant, spongy. 

 Gen. A h'eopora, ifontipora, Psammocora. 



Sub-Order 3. Zoantharia; Tabvlutfe. 



Corallum essentially composed of a well developed mural system, and 

 having the visceral chambers divided into a series of stories by com- 

 plete transverse tabulae or diaphragms ; septal apparatus rudimentary. 



Family 8. MiHeporidce. 



Corallum principally composed of a very abundant ccanenchyma, 

 distinct from the walls of the corallites, and of a tubular or cellular 

 structure ; septa not numerous ; tabulae numerous and well formed. 

 [MII.LEPORID.S.] 



Gen. Miltepora, ffeliopora, Heliolita, PitttUipora, Plaimopora, 

 Propora, Axoi>ora, Lobopora. 



Family 9. Pavositidcc. 



Corallum essentially formed by lamellar walls, with little or no 

 occnencbyma ; visceral chambers divided by nuuerous and well 

 developed complete tabula?. 



First Tribe. Favositidte. 



Corallum massive ; walls perforated ; septa rudimentary ; no cccnen- 

 chyma. [MILLEPORHXE.] 



Gen. Fawuititet, Michelinia, Konincia, Alveolitet. 

 Second Tribe. Clutletince. 



Corallum massive ; walls not perforated ; neither septa nor coenen- 

 chyma. 



Gen. CJuclttei, Dania, Stenopora, Cowtettaria. 

 Third Tribe. Halyiitina. 



Corallum composed of corallites constituting vertical laminae or 

 fasciculi, but more or less free laterally, and united by means of 

 connecting tubes or mural expansions ; walls well developed and not 

 porous ; septa distinct but small. 



Gen. JIalytitts, Uarmodita, T?iecoitegile. 



Fourth Tribe. Pocilloporinee. 



Corallum massive, gibbous ; walls imperforated ; ccenenchyma 

 abundant. 



Genus Pocillopora. 



Family 10. Serialoporidm. 



Corallum arborescent or bushy, with an abundant compact coonen- 

 chyma ; visceral chambers filling up by the growth of the coluraella 

 and the walls, and showing but few traces of tabukc. 



Gen. Seriatopora, Dendropora, Rlutbdopora. 

 Family 11. Thecidce. 



Corallum massive, with an abundant compact spurious coonenchyma, 

 produced by the septa becoming cemented together laterally ; tabula: 

 numerous. 



Genus Thecia. 



Sub-Order 4. Zoantharia Jtugoia. 



Corallum simple or composite, with a septal apparatus never forming 

 six distinct systems, as in all the preceding Zoantharia, but appearing 

 to be derived from four primary elements. The corallites are always 

 perfectly distinct, and are never united by means of a ccanenchyma, 

 nor do they ever form linear series, which is often the case in the 

 preceding sections. They multiply by gemmation, and the repro- 

 ductive buds are in general developed on the surface of the calices of 

 the parents ; this often arrests the growth of the latter, and gives 

 rise to a superposition of generations. 



Family 12. Stauridce. 



Corallum with well-developed septa, extending without any inter- 

 ruption from tlie bottom to the top of the visceral chamber, united 

 by lamellar dissepiments, and arranged in four systems, characterised 

 by an equal number of large primary septa. 



Gen. Stauria, Holocyttis, 



Family 13. Cyalhaxonida. 



Comllura with well-developed complete septa, which extend with- 

 out interruption from the bottom to the top of the visceral chamber, 

 and not forming a regular radiate circle ; those of the primary cyclura 

 not much larger than the others, and not forming a 4-branched cross 

 a* in the StanrUa, one well-characterised septal fossula ; no dis- 

 sepiments nor tabulic. 



Genus C'yatha;conia. 



Family 14. Cyathophyllidte. 



Corallum with incomplete septa that do not extend from the 



bottom to the top of the visceral chamber in the form of uninter- 

 rupted laminae ; those of the primary cyclum similar to the others, 

 and not forming a central 4-brauched cross ; septal fossulse varying 

 in number and in, size; visceral chamber divided by a series of super- 

 posed tabular. 



First Tribe. Zaphrentince. 



A single septal fossula well-developed, or replaced by a sulcus or 

 a crestiform process, and occasioning more or less irregularity in the 

 radiate arrangement of the septal apparatus. The Corallum is simple 

 and free in all the known species. 



Gen. Zaphrentii, Amplexus, Menophyllum, Lophophyllv/m, Aniso- 

 phyllum, Baryphyllum, ffallia, Atdacophyllum, Trochophyllum, Hadro- 

 phyllum, Combophyllum. 



Second Tribe. Cyathophyllince. 



Septal apparatus radiate and uninterrupted, or divided into four 

 groups ; no true columella. 



Gen. Cyathophyllum, Pachyphyllum, Campophylluin, Streptelasma, 

 Omphyma, Goniophyllum, Chonopkyllum, Ptychophijllum, ffeliophyllum, 

 Meriophyllum, CHsiophyllum, Aulophyllum, Acervularia, Strombodes, 

 P/tillipaalrea, Eridophyllum. 



Third Tribe. I/ithodendroninas. * 



Axis of the visceral chamber of the corallite occupied by a styliform 

 or lamellar columella. 



Gen. Lithodendron, Nematophyllum, Lithostrotion, Axophylhim, 

 Synngophyllum, 



Family 15. CyitiphyUidie. 



Corallum essentially composed of a vescicular tissue, and presenting 

 little or no traces of septa or radiate striae. 

 Genus CysliphyUum. 



Sub-Order 5. Tioanlharia Gaidlculata. 

 Polypi supported on a sclerobasis or epidermic stem-like corallum. 



Family 16. Antipathida. 

 Gen. Antipathee, C'impathes, Leiopat/tea. 



Sub-Order 6. Zoantharia Incerlce Sedis. 

 Gen. Ifeterophyllia, Mortieria, Cyclocrinitea. 



Order 2. ALCYONAMA. , 



Polypi with bi-pinnate tentacula, and only eight perigastric mem- 

 branaceous laminae, containing the reproductive organs. 



Family 1. Alcyonidce. 

 Polypi adherent, and not provided with an epidermic sclerenchyma. 



First Tribe. Cornulariiue. 



Polypi simple or aggregate, and produced by gemmation on creep- 

 ing stolons or basal membranaceous expansions, and having no lateral 

 buds or connecting appendices. 



Gen. Cornularia, Clavularia, Bkizoxenia, Sarcodictyon, Ant/ielia, 

 Sympodium, Aulopora, Cladochonua. 



Second Tribe. Tubiporince. 



Polypi fasciculate, and provided with independent tubular poly- 

 pidoms, united at various heights by means of horizontal connecting 

 plates, the surface of which produces the reproductive buds. 

 Genus Tubipora. 



Third Tribe. Teleathince. 



Polypi segregate ; buds in lateral branched tufts. 

 Genus Telestho. 



Fourth Tribe. Alcyonince. 



Polypi aggregate and multiplying by lateral gemmation, so as to 

 constitute a ramified, lobate, or simple mass. [ALOYONiDiE.] 



Gen. Alcyonium, Xenia, Nephthya, Paralcyonium, Sarcophy/on, 

 Cepitularia, Diitichopora. 



Family 2. Gorgonida:. "' 



Polypi provided with a thick tuberous cconsnctyma, surrounding a 

 central stem that is adherent to an extraneous body by its basis, and 

 is formed of epidermic sclerencbyma. 



First Tribe. Gorgonina. 

 Common axis inarticulate, horny, or fasciculate, but not calcareous. 



[QoBOONIA.] 



Gen, trui-yoHM, Pterogorgia, Sebryce, Phyllogorgia, Phycogoryia, 

 ', Primnoa, Solanderia, Sriarewm. 



Oorgonia lepadi/era. 



