NORTH AMERICAN EARLY TERTIARY BRYOZOA. 



353 



SCHIZOBRACHIELLA, new genus. 



The oviccll is hyperstomial and closed by the operculum. The frontal is a 

 tremocyst. The operculum boars a straight poster notched by a small, narrow, 

 rounded rimule. The tongue of the operculum is rigid and is not attached to the 

 compensatrix ; the muscular attachments are placed near the border. No avicularia. 



Genotype. Schizobrachiella (Hemeschara) sanguined Norman, 1868. Range: 

 Helvetian Recent. 



The recent species of this genus are : 



Schizobrachiella (H emeschara) sanguinea Norman, 1868. 



iSchizobrachiella (Lepralia) Candida Stimpson, 1853. 



Schizobrachiella (ScMsoporella) levinseni Nordgaard, 1905. 



C "85 



A '30 



FIG. 106. ScJiizobracMella, new genus. 



A-D. Schteobrachiella sanguinea Norman, 1868. A. Zooecia, X 30. (After Hincks, 1880.) 



B, C. Operculum, X 85. (After Waters, 1879.) D. Operculum, X 85. (After Nordgaard, 

 1905.) 



E. SchigobrnchieUa levinseni Nordgaard, 1905. Operculum, X 85. (After Nordgaard, 1005.) 



The known fossil species are : 



Schizobrachiella (Lepralia) goniostoma Reuss, 1847. 



Schizabrachiclla (Lepralia) granoso-porosa Reuss, 1874. 



Schizobrachiella (Lepralia) crassipora Reuss, 1874. 



Kchizobrachiella (Schizoporclla)alata MacGillivray, 1895. 



Schizobrachiella (Schizoporella) stibsinuata MacGillivray, 1895. 



This genus differs from Dakaria Jullien, 1904, in a much smaller rimule, in the 

 muscular attachments very near the border of the operculum, and in the absence of 

 interior condyle. 



This genus differs from Schizolavelfa and Schizomavella in the absence of 



'avicularia. 



Genus SCHIZOMAVELLA Canu and Bassler, 1917. 



1917. Schizomavella CANU and BASSLER, Synopsis of American Early Tertiary Cheilostome 



Bryozoa. Bulletin 96, United States National Museum, p. 40. 



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 

 5589919 Bull. 106 23 



