NORTH AMERICAN EARLY TERTIARY BRYOZOA. 



625 



STICHOPORINA PROTECTA Koschinsky, 1885. 



Plate 79. figs. 15-18. 



1885. Stichoporina protecta KOSCHINSKY, Ein Beitrag zur Bryozoenfauna der illteren Ter- 

 tiiirschiehten des siidlichen Bayerns, Abth. 1, Cheilostomata, Paleontographia, 

 vol. 32, p. 65, pi. 6, figs. 8-11. 

 1891. Stichoporina simplex WATERS, North Italian Bryozoa, Quarterly Journal Geological 



Society, London, vol. 47, p. 31, pi. 4, figs. 16-18. 



1909. Sticlioporina protecta CANU, Bryozoaires des terrains tertiaires des environs de Paris, 

 . Annales de Paleontologie, vol. 4, p. 101, pi. 11, fig. 8. 



FIG. 188. Genus Stivhoporina Stoliczka, 1861. 



A-H. Sticlioporina simplex Koscbinsky, 1885. A. Zoarium, natural size. B. Zooecia, X 25. 

 C. Operculuni of an ordinary zooecium, X 60. D. Operculum of an ovicelled zooeeiuni, X 60. 

 E. Avicularian mandible, X 100. (A-E after Kirkpatrick, 1890.) F. Zooeeia, X 11. G. Internal 

 face, X 15. H. Longitudinal section. X 15. (F-H after Koschinsky, 18S5.) 



I, J. Stichoporina cranilabris Koschinsky, 1885. I. Isolated zooecia, X 22. J. Longitudinal 

 section, X 22, showing the lateral septulae. (I, J after Koschinsky, 1885.) 



K. Sticlioporina protecta Koshchinsky, 1885. Longitudinal section showing the parietal 

 septulae, X 22. (After Koschinsky, 1885.) 



Variations. Our specimens very well resemble the specimens previously de- 

 scribed by other authors. The apertura of the ovicelled zooecia is larger than 



55899 19 Bull. 106 40 



