242 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Genus PLEUROSCHIZIELLA Canu, 1918 



The ovicell is hyperstomial and closed by the operculum. The 

 frontal is formed of costules. The apertura bears a triangular proxi- 

 mal rimule. The apertura of the ovicelled zooecia is larger and 

 without rimule. Irregular zooeciules are scattered among the 

 zooecia. 



Genotype. — Pleuroschiziella anaticula Canu, 1918. Eocene (Lute- 

 tian). 



Genus DECURTARIA Jullien, 1886 



Zooecia with the frontal formed by robust ribs forming a relief on 

 the exterior surface and separated from each other by narrow deep 

 furrows at the bottom of which exist pores of variable dimensions. 

 Orifice semilunar in the young zooecia becoming constricted by two 

 lateral spines in the old zooecia where the inferior lip sometimes 

 bears a small protuberance which divides again the inferior portion of 

 the orifice into two lobes; no marginal spines. The avicularia cor- 

 respond to the intercostal spaces. (Translation from Jullien.) 



Genotype. — Decurtaria (Semiescharipora) cornuta Beissel, 1865. 



Range. — Cretaceous (Campanian) — Miocene (Tortonian). 



Genus uncertain, the ovicell being unknown. Waters places the 

 second species (Lepralia peltata Reuss, 1874) cited by Jullien in 

 Figularia. See also Lang, 1922, p. 385. 



Genus COLLETOSIA Jullien, 1886 



The frontal is formed by more or less voluminous ribs, the margins 

 of which unite with neighboring margins forming wide furrows 

 entirely deprived of pores. Orifice semilunar, deprived of marginal 

 spines. (Translation after Jullien, 1886.) 



Genotype. — Colletosia (Lepralia) endlicheri Reuss, 1874. Miocene. 



Genus uncertain, the ovicell 'being unknown. It may not belong 



to the Costulae. 



Genus COLLARINA Jullien, 1886 



Zooecia in which the frontal is completely surrounded, except at 

 the base, by a kind of collar or border, pierced by wide pores; the 

 talon of the ribs may be pierced by a large pore; the ribs are borne by 

 a smooth surface more or less extended which extends always between 

 them and the zooecial border. Orifice semilunar, deprived of mar- 

 ginal spines. Avicularia marginal or dispersed on the border of the 

 zooecia" (translation after Jullien). The ovicell is cndozooecial. 



Genotype. — Collarina (Lepralia) (Cribrilina) c7ieZ2/sKoschinski, 1885. 



Range. — Cretaceous (Coniacian), Eocene. 



