CLASSIFICATION OF ZOOPHYTES. Hy 



Fa3iily II. Favositid.k. Polyps with 12 tentacles, secreting lime periodically at 

 base, and hence the cells have a calcareous bottom and in the interior of the corallum are 

 transversely septate, rarely solid. 



Genera. Alveopora (^Alveoporin<e) \ Sideropora, Seriatopora, Pocillopora, Stenopora, 

 Constellaria, Favosites, Catenipora {Favositlnct) ; Heliopora, Heliolites, Millepora, 

 (Helioporirue). 



Family III. Pohitid-e. Polyps with rarely more than 12 tentacles, forming porous 

 calcareous secretions continuously at base ; coralla every where equally fine-porous, 

 cells shallow or superficial and scarcely traceable within the coralliun, rays indistinct. 



Genera. Porites, Goniopora. 



Tribe IV.-ANTIPATHACEA. 



Animals with 6 tentacles, forming at base corneous secretions. 



Family I. Antipatiiide. Animals fleshy, enveloping a corneous spinulous axis. 



Suborder II.— ALC YON ARIA. 



Animals with 8 tentacles ; tentacles papillose, papillfe perforate 

 at apex: often coralligenous ; coralla calcareous or corneous, rarely 

 siUceous, cells never radiate within. 



Family I. Pennatulidjs. Never attached, but either free or with the base buried in 

 the mud. 



Genera. Renilla, Pcniiatula, Verefillum, Funiculina, Virgularia (Pennatulina) ; 

 Pavonax'ia, Umbelluluria (^Pavonarinai). 



Family II. Alcyo.vid/E. Fleshy, usually containing disseminated calcareous granules. 



Genera. Rhizo.venia, Anthelia, Xenia [Xenince) ; Ammothea, Sympodium, Nephthya, 

 Alcyonium {Alcijonince) ; Spoggodia {Spnggodince). 



Family III. Cornulabid.e. Forming corneous tubular coralla. 



Getms. Cornularia. 



Family IV. Tubiporid.e. Forming calcareous tubular coralla. 



Genera. Aulopora, Telesto, Tubipora, S3ringopora (?). 



Family V. Gohgonidx. Forming basal epidermic secretions, and often, also, other 

 tissue secretions, the latter separable from the former. 



Genera. Corallium [Coralliince) ; Hyalonenia, Briareum, Gorgonia, Primnoa, Bebrycc 

 (Gorgonina) ; Isis, Mopsea, Melitsea (^Isina). 



Order XL— HYDROIDEA. 



Animals with the internal cavity tubular and quite simple : ovules 

 growing outward from the sides. 



Family I. Hydrid.e. Ovules single ; buds lateral, young falling off when full grown : 

 not coralligenous. 

 Genus. Hydra. 



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