der niederen Thiere während des Jahres 1859- 317 



Trib. 4. Verctilleao. The coral club-shaped. The polypes on 

 all sides of the club. Gen. Liluaria , Sarcobelemnon , Cavernularia, 

 Veretillum. 



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

 slender stallt, The polypes only onone sur face of the expanded disk. 

 Gen. Renitla. 



Fam. 2. Utnb ellular iad ae. The body free, umbellate, with 

 a long stem and a simple central axis. The npper pari with a Clu- 

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

 large head. Axis fusiform elongate, as long as the stem of the coral. 

 Gen. Umbellularia. 



II- Spongicolae or Hyalophyta. 



Subsymmetrical , living stinken by the base into a sponge, 

 strengthened by süiceous spiculae and sitpportet by a central axis, 

 formed of numerous twisted elongaled silicious fibies- (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, sup- 

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

 led by a central calcareous or horny tree-like axis wilh an expanded 

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

 the sea-shore. 



* Lithophyla. Coral arborescent, supported by a continuous or 

 jointed calcareous axis, which effervesces with muriatic aeid. 



f Axis continuous, not jointed. 



Fam. 1. C orallia üa e. Axis inarticulate, solid, continuous. 

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

 nella , Ellisella (Juncella et Ctenocella) , ? Gorgonella , Scirpeaiia, 

 Umbracella, Subergorgia. 



Fam. 2. P rimno ad ac. Axis inarticulate solide. Bark formed 

 of flat imbricate scales. Folypc-cells prominent, covered with imbii- 

 cate scales. Gen. Primnoa, Callogorgia, rrimnoclla. 



ff Axis articulated. 



Fam. 3. M elil aeada e. Axis spongy , permeated by flexuous 

 tubulär canals interrupted by harder swellen calcareous joints. Bark 

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

 Hopsella, ?Solanderia. 



Fam. 4- Itideac. Axis calcareous, sulid, dividcd by narro- 

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

 Gen. Isis (Cynosairc), Isidt-Ila, Mopsca. 



•* Ceratupkyta. Coral arborescent, supported by n conti- 



