BEITISH PAL^OGENE BETOZOA. 225 



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



secondary aperture. Gonoecia and no external marsupia. 

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



Subfamily 1. Microporellinm. Holostomatous Microporellidse with external marsupia. 



„ 2. Schismoporeilinece. Microporellidse which are both schizostomatous and trypiate. 

 „ 3. Adeonirke. 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. Lepraliid^e. Holothyriata with a simple primary aperture. 

 Subfamily 1. Lepraliirue. Lepraliidie with external ooecia. 



Alliance 1. Cycliopora. Lepraliinse with simple zooscia having orbicular apertures 



which are often surrounded by raised rims. 

 Alliance 3. Lepralia. Lepraliinse with the aperture usually horseshoe- shaped and never 

 truly orbicular. 

 Subfamily 2. Teichoporince. Lepraliidae with gonoecia and no external ooecia. 



„ 3. Reteporime. Lepraliidae with the zooecia obliquely placed on a unilamiuar, 

 reticulate or ramose, erect zoarium. 

 Family 20. Celleporid^. Holothyriata with barrel-shaped or uiceolate zooscia, usually growing 



in heaped masses ; aperture terminal or subterminal. 

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

 denticulate. 



Order CYCLOSTOMATA. 



Family 1. Idmoneid^e. | Family 2. HETERoPORiDiE. 



IV. Systematic Synopsis. 



Class ECTOPKOCTA. 



Subclass GYMNOL^MATA. 



Order CHEILOSTOMATA. 



Suborder STOLONATA. 



Family EUCEATIIDiE. 



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

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

 apertures of each series respectively open in the same direction. 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 tlie list of six species with the figures of their opcrcula pubhshed 

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

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



