NORTH AMERICAN EARLY TERTIARY BRVOZOA. 



341 



r*_ T Schlzopodrc] lr -nlccrnis JpnusLtJn 



P S- 



K-1SU 



T o -85 



K 0, ruHilEOpOclroiltt nlvca Bu.i 



"85 N 85 



M w *8 x X85 Y 



U85 A >85 



V V-Z. SchltopodrellB liiinorls Rassal 



FIG. 101. Genus Schizopodrella Canu and Bassler, 1917. 



A. Schizopodrella unicornis Johnston, 1847. Zooecia with ovicells and avicularia, X 25. 

 (After Hincks, 1880.) 



B. Schizopodrella nivea Busk, 1884: Zooecia, X 25. (After Waters, 1913.) 



C. Schematic section through the ovicell of Schizopodrella unicornis Johnston, 1847. (After 

 Levinsen, 1909.) ect, ectocyst; ol, olocyst ; on, ovicell operculum; op, operculum; tr, tremocyst; 

 v, vestibulum. 



D. Schizopodrella nivea Busk, 1884. The two zooecia figured X 50, were near together, but 

 not in the same row, and are placed together to save space. A sac-like structure (sc) is shown 

 at the base of each ovicell (oc), but of the numerous muscles in this sac only about half of those 

 in focus are drawn. It seems that the ovum (ov) passes into this sac, which is then ruptured 

 (r), and the ovum is pressed forward into the ovicell, where it segments. The small oral 

 glands are shown (go). 



E-J. Schizopodrella. unicornis Johnston, 1847. E, F, G. Mandibles, X 85. H, I, J. Oper- 

 cula, X 85. (After .Waters, 1913, and Nordgaard, 1905.) 



K-O. Schizopodrella nivea Busk, 1884. K. Basal avicularium, X 150. L. Lateral avicu- 

 larium, X 150. M. Mandible, X 85. N. Oral aperture closed by calcareous wall. ) ', 85. 

 O. Operculum, X 85. (After Waters, 1913.) 



P-S. Schizopodrella longirostris Hineks, 1886: P. Avicularium, X 75. Q. Mandible, X 75. 

 R. Oral aperture X 75. S. Operculum, X 100. (P-S after Levinsen, 1909.) 



T. Stylopoma spongitcs Pallas, 176G. Opercula, X 100. (After Levinsen, 1909.) (Intro- 

 duced by error.) 



U. Schizopodrella elmwoodiae Waters, 1900. Operculum, X 85. (After Waters, 1900.) 



V-Z. Schizopodrella linearis Hassal, 1841. V, W. Mandibles, X 85. (After Levinsen and 

 Waters.) X, Y, Z. Opercula, X 85. (After Waters and Nordgaard.) 



A'. Schizopodrella errata (Waters, 1875). Operculum, X 85. (After Waters, 1879.) 



