74 BULLETIN 96, UNITED STATES NATIONAL MUSEUM. 



Genus FEDORA Jullien, 1882. 



1882. Fedora Jullien, Dragages du Traraillcur, Bulletin Society Zoologique 

 France, vol. 7, p. 17. 



According to Jullien this genus has the following characters: 



Zooecia subhexagonal with circular orifice, thick but not salient, 

 notched on its posterior fourth Avhere it is thin; finally placed a 

 little above the center of the zooecium, of w^hich it occupies about a 

 third of the diameter ; the ovicell nonsalient, indicated exteriorly by 

 a smooth stripe forming an obtuse angle, of which the summit is 

 turned toAvard the orifice. Avicularia not constant, situated on the 

 sides and outside of the orifice. 



Genotype. — Fedora edwardsl Jullien, 1882. 



Range. — Lutecian-Recent. One American species. 



Genus STICHOPORINA Stoliczka, 1862. 



1862. Stichoporina Stoliczka, Olisociine Bvyozoeu von Latdorf in Bern- 

 burg. Sitzungsbericlite dcr k. Akademie der Wissenscliaften, Wien, 

 vol. 45, Abth. 1, pp. 71-74, pis. 1-3. 

 The zoarium is cupulif orm. The apertura is orbicular or elliptical 

 with two cardelles ; the apertura of the ovarian zooecia is larger and 

 transverse. The avicularia have some vibraculoid mandibles. 

 Genotype. — Stichoporina. simplex Koschincki. 1885. 

 Range. — Lutecian-Recent. 



The only American species of Stichoporina differs in no appreci- 

 able manner from the well-known S. protecta Koschinski of the 

 Lutecian and Priabonian. In North America the species has been 

 found only in the Middle Jacksonian of North Carolina. 



SCHIZORTHOSECOS, new genus. 



(Schizos, slit; orthos.^ straight; secos, small habitation.) 



The zoarium is cupulif orm. The apertura is oval with a proximal 

 rounded rimule. There are numerous interzooecial zooeciules capable 

 of being transformed into avicularia, into radicular zooeciules, and 

 into compensation zooeciules. 



Genotype. — Schizorthosecos (OrhitoUtes) interstitia Lea, 1833. 



Range. — Claibornian, Jacksonian. 



This genus is exclusively American; it characterizes the Clai- 

 bornian and the base of the Jacksonian where it is exterminated 

 unexpectedly. 



It differs from C onescharellina D'Orbigny and Bipora Whito- 

 legge, 1887, in its distinct zooecia and in the absence of lunoecia. More- 

 over, we have not yet discovered the ovicells on the hundreds of 

 specimens w^hich we have at our disposal. 



