NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
353 
SCHIZOBRACHIELLA, new genus. 
The ovicell is hyperstomial and closed by the operculum. The frontal is a 
tremocyst. The operculum bears 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 ( Iiemeschara ) sanguinea Norman, 1868. Range: 
Helvetian — Recent. 
The recent species of this genus are : 
Schizobrachiella ( Iiemeschara ) sanguinea Norman, 1868. 
Schizobrachiella ( Lepralia ) Candida Stimpson, 1853. 
Schizobrachiella (Schizoporella) levinseni Nordgaard, 1905. 
Fig. 106. — Schizobrachiella, new genus. 
A-D. Schizobrachiella sanguinea Norman, 1868. A. Zooecia, X 30. (After Hindis, 1880.) 
B, C. Operculum, X 85. (After Waters, 1879.) D. Operculum, X 85. (After Nordgaard, 
1905.) 
E. Schizobrachiella levinseni Nordgaard, 1905. Operculum, X 85. (After Nordgaard, 1905.) 
The known fossil species are : 
Schizobrachiella ( Lepralia ) goniostoma Reuss, 1847. 
Schizabrachiella ( Lepralia ) granoso-porosa Reuss, 1874. 
Schizobrachiella ( Lepralia ) crassipora Reuss, 1874. 
Schizobrachiella (Schizoporella) alata MacGillivray, 1895. 
Schizobrachiella ( Schizoporella ) sabsinuata 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 Schizolavella and Schizomavella in the absence of 
avicularia. 
Genus SCHIZOMAVELLA Canu and Bassler, 1917. 
1917. Schizomavella Canu and Basslek, 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 
55S99— 19— Bull. 106 23 
