NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
625 
STICHOPORINA PROTECTA Koschinsky, 1885. 
Plate 79. figs. 15-1S. 
1885. Stichoporina protecta Koschinsky, Ein Beitrag zur Bryozoenfauna der alteren Ter- 
tiarschichten des siidliehen Bayerns, Abtli. 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. Stichoporina protecta Cantj, Bryozoaires des terrains tertiaires des environs de Paris, 
Annales de Paleontologie, vol. 4, p. 101, pi. 11, fig. 8. 
Fig. 188. — Genus Stichoporina Stoliezka, 1861. 
A-H. Stichoporina simplex Koschinsky, 1885. A. Zoarium, natural size. B. Zooecia, X 25.- 
0. Operculum of an ordinary zooecium, X 60. D. Operculum of an ovicelled zooecium, X 60. 
E. Aviculariau mandible, X 100. (A-E after Kirkpatrick, 1890.) F. Zooecia, X 11. G. Internal 
face, X 15. H. Longitudinal section. X 15. (F-II after Koschinsky, 1885.) 
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. Stichoporina 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 
