NORTH AMERICAN EARLY TERTIARY BRYOZOA. 



509 



Genus LEPRALIELLA Levinsen, 1916. 



1916. Lepraliella LEVINSEN, Bryozosi Denmark-Ekspeditioueu 

 1906-1908, vol. 3, No. 16. p. 466. 



til Groulauds Nordostkyst 



"The zooecia are provided with a distinct, not beaded or faintly so, vestibular 

 arch, and with two well-developed hinge-teeth. A well chitinized operculum. 

 Avicularia of different size and position. The ovicells-, the proximal portion of 

 which is not pedicel-shaped or shaft-like, have no pores and are not provided with 

 an inwards directed tongue." (Levinsen.) 



Genotype. Lepraliella (Cellepora) contigua Smitt, 1867. Recent. 



E ioo 



Fxioo 



FIG. 145. Genus Rhynchosoon Hincks, 1S01. 



A-G. Rhynclioxoon angulatum Levinsen, 1909. A. Zooecia, X 55. B. A zooecium. seen from 

 the left side wall. On the left side is seen an avicularium, X 55. C. Zooecia seen from the 

 basal side after removal of the basal wall. X 55. D. Ovicelled zooecia, X 55. E. Operculnni, 

 X 100. F. The aperture with the operculum in situ. The beaded vestibular arch is seen shining 

 through the operculum, X 100. G. Avieiilarian mandible. X 100. (A-G after Levinsen. 1909.) 



H-J. Opercula and mandibles. H. Rhyncliozoon scintillans Hincks, 1885, X 140. (After 

 Levinsen, 1909. ) I. R. profundum MacGillivray, 1881. (After Waters, 1887.) J. R. comigatum 

 Thornely, 1905, X 85. (After Waters, 1909.) 



Family GALEOPSIDAE Jullien, 1903. 



1903. JULLIEN, Bryozoa provenant des Campagiies de I'Hirondclle, pi. 14. 



The ovicell is hyperstomial and opens into the peristomie above the operculum. 

 A spiramen introduces into the peristomie the water destined afterwards for the 

 compensatrix. 



In the family of the Adeoniclae, as in that of the Reteporidae, this spiramen 

 also exists: it is in evident relation with the hydrostatic system, as is proved by the 



