NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
509 
Genus LEPRAL1ELLA Levinsen, 1916. 
1916. Lepraliella Levinsen, Bryozoa Denmark-Ekspeditionen til Gronlands Nordostkyst 
1906-1908, vol. 3, No. 16. p. 466. 
“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 ivitli 
an inwards directed tongue.” (Levinsen.) 
Fig. 145. — Genus Rhynchozoon Hincks, 1891. 
A-G. Rhynchozoon angulatum Levinsen, 1909. A. Zooecia, X 55. B. A zooecium. seen from 
the left side wall. On the left side is seen an avieularium, X 55. G. Zooecia seen from the 
basal side after removal of the basal wall, X 55. D. Ovicelled zooecia, X 55. E. Operculum, 
X 100. F. The aperture with the operculum in situ. The beaded vestibular arch is seen shining 
through the operculum, X 100. G. Avicularian mandible, X 100. (A-G after Levinsen, 1909.) 
H-J. Opercula and mandibles. H. Rhynchozoon scintillans Hincks, 1885, X 140. (After 
Levinsen, 1909.) I. R. profundum MacGillivray, 1881. (After Waters, 1887.) J. R. corrugatum 
Thornely, 1905, X 85. (After Waters, 1909.) 
Family GALEOPSIDAE Jullien, 1903. 
1903. Jullien, Bryozoa provenant des Oampagnes de VEirondelle, 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 Adeonidae, as in that of the Keteporidae, this spiramen 
also exists ; it is in evident relation with the hydrostatic system, as is proved by the 
