NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
Ill 
Genus SETOSELLINA Calvet, 1906. 
1906. Setosellina Calvet, Note preliminaire sur les Bryozoaires recueillis pa r les expeditions 
du TravaiUeur (1881-82) et du Talisman (1883), Bulletin Museum Histoire Na- 
turelle, p. 157. 
The original description is as follows : 
Zooecies s’irradiant plus ou moins regulierement autour de l’oozoide, separees entre elles, 
dans les series radiaires, par des vibraculaires. Frontale zoeciale en grande partie mem- 
braneuse, de forme ovale, a orifice zoeciale semicirculaire, dont le bord convexe correspond au 
bord superieur de l’area, ferine par un opercule a bord convexe chitineux. Vibraculaires 
arrondis d area membraneuse oblongue, dirigee suivant l’axe longitudinal de la zooecie. 
Genotype.- — Setosellina roulei Calvet, 1907. 
Range. — Priabonian-Eecent. 
This genus differs from Vibracellina Canu and Bassler, 1917, only in the 
arrangement of the vibracula. Calvet says that the genotype did not have an 
ovicell. Nevertheless there are two ovicells dratvn on his figure. 
Fig. 28.— Genus Hincksina Norman, 1903. 
A. Hincksina flustroides Hinclcs, 1880. Zooecia, X 50. (After Hindis, 1880.) 
B-F. Hincksina sceletos Busk, 1858. B. Zooecia, X 85. C, D. Spinous plates by the side of 
,the oral aperture, X 85. E. Frontal spine seen from the side, X 85. F. Mandible of the avicu- 
larium, X 85. 
G. Hincksina flustroides Hincks, 1880. Avicularian mandible, X 85. 
H. Hincksina pyrula Hincks, 1881. Avicularian mandible, X 85. (B-H after Waters, 1898.) 
Genus HINCKSINA Norman, 1903. 
1903. Hincksina Nokman, Natural History of East Finmark, Annals and Magazine Natural 
History, ser. 7, vol. 11, p. 585. 
Zooecia incrusting, having the entire area membranous, the margin surmounted 
by numerous spines. Ovicell small, short, and little raised. Avicularia occupying 
distinct cells sparingly scattered among the zooecia, ova],, with semicircular man- 
dible. No dietellae. (Norman.) 
Genotype. — M embranipora flustroides Hincks, 1880. 
Range. — Jacksonian-Eecent, 
