NORTH AMERICAN EARLY TERTIARY BRYOZOA. 



Ill 



Genus SETOSELLINA Calvet, 1906. 



1906. Sctosellina CALVET, Note pre'liminaire sur les Bryozoaires recueillis par les expeditions 

 (hi TravaiJleur (18S1-82) et clu Talisman (1883), Bulletin Museum Histoire Na- 

 turelle, p. 157. 



The original description is as follows : 



Zooecies s'irradiant plus ou moins regulierfiinent autour de 1'oozoide, sdpar^es entre elles, 

 dans les series radiaircs, par des vibraculaires. Frontale zoeciale en grande partie ni6m- 

 braneuse, de forme ovale, a orifice zoeciale semicirculaire, dont le bord convexe correspond au 

 bord sup6rieur de 1'area, ferine par un operculc a bord convexe chitineux. Vibraculaires 

 arrondis a area membraneuse oblongue, dirigee suivant 1'axe longitudinal de la zooecie. 



Genotype. Setosellina roulei Calvet, 1907. 



Range. Priabonian-Recent. 



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 drawn on his figure. 



D x85 



85 



FIG. 28. Genus Hincksina Norman, 1903. 



A. Hincksina flustroides Hincks, 1880. Zooecia, X 50. (After Hincks, 1880.) 



B-F. Hincksina sceJetos 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 NOBMAN, 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, oval, with semicircular man- 

 dible. No dietellae. (Norman.) 



Genotype. M cmbranipora flustroides Hincks, 1880. 



Range. Jacksonian-Recent. 



