MEMBRANIPORID^. 31 



2. M. MONOSTACHYS, Bush. PI. II, fig. 2. 



Polyzoario primura ramoso, deinde conferto ; cellulis ovatis seu pyriformibus deorsum 

 attenuatis, in seriebus linearibus dispositis. Apertura ovali margine tenui, granulosa; 

 spina submarginali unica acuminata sub aperturam posita. Aviculariis subinde inter 

 cellulas sparsis. 



Polyzoarium in the young state ramose ; cells ovate or pyriform, attenuated down- 

 wards, and disposed in linear series. Aperture oval, margin thin, granular, a single 

 acuminate submarginal spine below the aperture ; avicularia sometimes scattered amongst 

 the cells. 



M. MONOSTACHYS, Bush, B. M. Cat,, P. ii, p. 61, 1. Ixx. 



M. NUDA, S. Wood, MS. label on specimen. 



Flustra pustulosa (?), jyOrhigmj, Terr. Cret., pi. dccxxv, figs. 22 — 25. 



Memb. nobilis (/), Ueuss, Fossil Polyp., W., T. Beck, p. 98, pi. xi, fig. 26. 



Habitat. — Red Crag, on Mactra ovalis, Mya arenaria and Purpura lapillus (?) {Recent) 

 abundant on the Suffolk coast, in the mouth of the Deben, &c., on shells. 



3. M. Savartii, Aud. PI. II, fig. 6. 



Area quadrangulari oblonga ; marginibus incrassatis, granulosis, sulcatis ; apertura 

 magna subelliptica. 



Area of cells quadrangular oblong ; ridges thick, granular, deeply sulcate ; often a 

 triangular space at each angle of the cell. Aperture large, subelliptical. 



Flustra Savartii, Audouin, Expl. i, p. 240; Savign., Egypt, pi. x, fig. 10. 

 M. Lacroixii (var), BusJc, Brit. Mus. Cat., part ii, pi. civ, fig. 1. 

 Flustra distans 1 (pars ?) Hassall, Ann. N. H., vii, p. 369. 

 M. LiGERiENSis (?), VOrhigny, 1. c, pi. Dcvii, figs. 5, 6. 



Ifaditaf.—Red Crag, on Soien., S. W. {Becent) Britain (?) ; Mediterranean. 



4. M. DUBIA. PI. Ill, fig. 12. 



Polyzoario crasso ; cellulis elongatis oppositis, discretis ; marginibus incrassatis, glabris, 

 supra arcuatis. 



Polyzoarium thick ; cells elongate, oblong, opposite, separated by elongate spaces ; 

 margin rounded, smooth, arched above. 



