der niederen Thiere während des Jahres 1859. 317 



Trib. 4. Veretilleae. The coral club-shaped. The polypös on 

 all sides of the club. Gen. Lituaria , Sarcobelemnon , Caverniilaria, 

 Veretillum. 



Trib. 5. RenillGäO. The coral expanded , foliaceous , with a 

 slender stalk. The poiypes only onone siir face of the expanded disk. 

 Gen. Renilla. 



Fani. 2. Umh ellular iad ae. The body free, umbellate, with 

 a long Stern and a simple central axis. The «pper part with a dü- 

 ster of polype-beaiing cells placed in concentric series , forming a 

 large head. Axis fusiforn» elongate, as long as the steni of the coral. 

 Gen. Umbellularia. 



II. Spongicolae or Hyalophyta. 



Subsynimetrical , living sunken by the base inlo a sponge, 

 slrengthened by siliceous spiciilae and supportet by a central axis, 

 formed of numerous twisted elongated silicious fibres. (Wir verwei- 

 sen hier auf die oben bei Hyalonema zugefügte Bemerkung.) 



Fam. 1. Hyalonemidae. Gen. Hyalonema. 



III- Rnpicolae. 



Coral tree-like or expanded, fixed by an expanded base, snp- 

 ported by more or less fusiform calcareous spiculae and öfter suppor- 

 ted by a central calcareous or horny tree-like axis with an expanded 

 base. Living attached by the base of the coral and axis to rocks on 

 the sea-shore. 



■" Lifhophyta. Coral arborescent, supported by a continuous or 

 jointed calcareous axis, which effervesces with muriatic acid. 



f Axis continuous, not jointed. 



Fam. 1. C orallia il ae. Axis inarticulale, solid, continuous. 

 Bark granulär, with irregulär -shaped spiculae. Gen. Corallium, An- 

 nella, EUisella (Juncella et Ctenocella) , ? Gorgonella , Scirpearia, 

 Umbracella, Subergorgia. 



Fam. 2. Primnoadae. Axis inarticulate solide. Bark formed 

 of flat imbricate scales. Polype-cells prominent, covered with imbri- 

 cate scales. Gen. Primnoa, Callogorgia, Primnoella. 



ff Axis articulated. 



Fam. 3. M eli taedda e. Axis spongy^, permeated by flexuous 

 tubulär canals interrupted by harder svvellen calcareous joints. Bark 

 granulär; cells in series on the edge of the branchlets. Gen. Melitaea, 

 Mopsella, ?Solanderia. 



Fam. 4. Isideae. Axis calcareous, solid, divided by narro- 

 wed horny joints. Bark granulär, with irregular-shaped spiculae. 

 Gen. Isis (Cynosaire), Isidella, Mopsea. 



** Ceratophyta. Coral arborescent, supported by a conti- 



