40 BULLETIN 9<5, UNITED STATES NATIONAL MUSEUM. 



SCHIZOPODRELLA, new genus. 



The ovicell is hyperstomial. It opens above the apei"tnra by a 

 special opening closed by a special membrane and without connection 

 with the operculum ; it surmounts this apertura without inclosing it. 

 The inferior border of the apertura is somewhat concave and bears 

 a narrow rimule. The frontal is a tremocyst direct or covering a 

 very thin olocyst finely perforated. The muscular attachments are 

 generally at a distance from the border of the operculum. There 

 are oral glands. 



GeTwtype. — Schizopodrella {Lepralia) unicornis Johnston, 1847. 



Range. — Luteci an-Recent. 



STEPHANOSELLA, new genus. 



{Stephanos, crown, in reference to the crown-like border of the 

 ovicell.) 



The o^dcell is hyperstomial and imbedded in the distal zocecia. It 

 opens above the apertura by an especial orifice. The frontal is a 

 smooth olocyst. No spines. The ovicelled zocecia have a large aper- 

 tura and their avicularium is frontal. 



Genotype. — Stephanosella {Lepralia) hiaperta Michelin, 1845. 



Range. — Jacksonian-Eecent. 



SCHIZOMAVELLA, new genus. 



{Schizos, slit; mai^, abbreviation of median avicularium.) 



The operculum closes the ovicell. The muscular attachment is 

 generally in the immediate vicinity of the border of the operculum. 

 The rimule is wide and arched. The frontal is a tremocyst. A 

 median avicularium occurs on the front wall. There are small oral 

 glands. 



Genotxjpe. — SchlzomaveUa {Lepralia) auriculata Hassall, 1842. 



Range. — Jacksonian-Eecent. 



METROPERIELLA, new genus. 



{Metra, womb (ovicell) ; peri, around, in reference to the ovicell en- 

 tirely surrounding the apertura.) 



The ovicell is hyperstomial and completely surrounds the aper- 

 tura. The rimule is a large rounded sinus. The frontal is a tremo- 

 cyst bearing a median avicularium. 



Genotype — Metroperiella {Schizoporella) lepralioides Calvet, 1903. 



Range. — Jacksonian-Eecent. 



