BRITISH PAL^OGBNE BEYOZOA. 236 



Family 17. Adeonellid^. Scliizothyriata with a schizostomatous primary aperture and a variable 



secondary aperture. Gonoecia and no external marsupia. 

 Family 18. Microporellid^. Scliizothyriata provided with a trypa. 



Subfamily I. Microporellina. Holostomatous Microporellidae with external marsupia. 



„ 2. Schismoporellinex. Microporellidae which are both schizostomatous and trypiate. 

 „ 3. AdeoniruB. Microporellidse which are holostomatous and have gonoecia, but no 

 external marsupia. 



V. Suborder Holothyriata. 



Holostomatous Cheilostomata which have the front wall wholly calcified. 

 Family 19. LBPRALiiDyE. Holothyriata with a simple primary aperture. 

 Subfamily 1 . Lepraliince. Lepraliidije with external ooecia. 



Alliance 1. Cycliopora. Lepraliinse with simple zooecia liaving orbicular apertures 



which are often surrounded by raised rims. 

 Alliance 2. Lepralia. Lepraliinse with the aperture usually horseshoe- shaped and never 

 truly orbicular. 

 Subfamily 2. Teichoporince. Lepraliidie with goncecia and no external ooecia. 



„ 3. ReteporituE. Lepraliidae with the zooecia obliquely placed ou a unilaminar, 

 reticulate or ramose, erect zoarium. 

 Family 20. Celleporid/E. Holothyriata vrith barrel-shaped or urceolate zooecia, usually growing 



in heaped masses ; aperture terminal or subterminal. 

 Family 21. Smittiid^. Holothyriata with a raised secondary orifice; the primary orifice is often 

 denticulate. 



Order CYCLOSTOMATA. 



Family 1. Idmoneid/E. | Family 2. Heteroporid.*. 



IV. Systematic Synopsis. 



Class ECTOPEOCTA. 

 Subclass GYMNOLiEMATA. 



Order CHEILOSTOMATA. 



Suborder STOLONATA. 



Family EUCRATIID^. 



Genus Notamia, Fleming, 1828 (non Busk, Hincks, &c.). 



Diagnosis. Zoarium erect and phytoid; zocEcia biserial, joined back to back; the 



apertures of each series respectively open in the same dii-ection. Aperture large, on the 



front of the cell. Neither vibracula, avicularia, nor ooecia. [Fleming, No. i, p. 541.] 



appear to have been formally diagnosed ; but the list of six species with the figures of their opercula published 

 in the ' Prodromus' leaves no doubt as to its nature. [MaogLllivray, No. i, dec. xvii. jjp. 1 68, figs. 1-6. See also 

 MacgUlivray, No. 2, pt. v. pi. ii.] 



