The porifera and coelentera . pta the reader should refer to the excellent memoir of vonKoch (102).] Section 1. Aporosa. Simple or colonial Scleractiueae with solid theca and septa notperforated by canals ; the theca may be colonial forms the zooids may be separatetVoui one another, or, if in organic continuity,their cavities communicate only by means ofsuperficial canals in tlie coenosarc. Family Solitary palaeozoic Scleractineaewith an epithecal wall. Septa well developed,arranged pinnately with regard to four principalseptii, the main- and counter-septa. Tabula
The porifera and coelentera . pta the reader should refer to the excellent memoir of vonKoch (102).] Section 1. Aporosa. Simple or colonial Scleractiueae with solid theca and septa notperforated by canals ; the theca may be colonial forms the zooids may be separatetVoui one another, or, if in organic continuity,their cavities communicate only by means ofsuperficial canals in tlie coenosarc. Family Solitary palaeozoic Scleractineaewith an epithecal wall. Septa well developed,arranged pinnately with regard to four principalseptii, the main- and counter-septa. Tabulaepresent. Vesicular endotheca absent or scanty. Nocolumella. Genera — Zaphreiitis, Rafinesque andClifford; Amplexiu^, M. Edw. and II. ; Owphyma,Raf. and Clifford ; Strcptelasma, Hall ( and XXXV.), etc. Family 2. Turbino-lidae. Solitary Scleractineae, or forming coloniesby gemmation from the bases of the parent zooids(ir from a stolon-like expansion from the base ofthe i)arent zooid. Septa radial not piiniate. In-. Fi(i. XXXIV. cnrnieujiitn. Hall, ;TSilurmn terseptal loculi open to the base, Mithout tabulae8Uo7from^Zi^teir ^^^ o* dissepiments. 1. wall is ei)ithecate. Genera — Flabellum,Lesson ; Duncaiiia, Pourtales ; Schizocijathus, Pourtales ; lihizotrochiui,M. Edw. and H.; Plcurocyathus, Moseley ; iJesmojfhyllum, Ehrenb. ; THE ANTHOZOA 73 Blastotrochus, M. Edw. and H. ; Placocrjathus, M. Edw. The existenceof an epithecate wall, with which is correlated the absence of a perisarcis sufficient to separate the Flaliellinae from other Turbinolidae, andthe same feature brinies them into relationship with the researches may lead to the inclusion of several forms now classedas Turbinolinae amongst the Flabellinae. Flabellum variabile andFlacotrochus laevis reproduce themselves asexually by a process of strobil-isation, and Blastotrochus nutrix gives rise to lateral deciduous buds(see S
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