542 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
Generic Table. 
Zoarium articulated. No avicularia Tubucellaria. 
Zoarium fixed, bilameliar. Avicularia very rare - Tubucella. 
Zoarium unilamellar. Avicularia on each zooecium Tubiporella. 
The prefix “ tub ” might well remain the characteristic of the family in the 
creation of new genera. 
Fig. 160. — Genus TubuccUaria D'Orbigny, 1852. 
A-C. Tubucellaria cefeoides Ellis and Solander, 17S6. A. Portion of a zoarium, X 12. 
B. Operculum. X 85. C. Operculum of var. chualcensis Waters, 1907, X 85. (A-C after Waters, 
1907.) 
D-F. Tubucellaria opuntioides Pallas, 1766. D. Portion of a zoarium, X 12. E. Aspect 
of the surface of a zooecium. The ascopore is seen distally. F. Operculum, X 75. (D-F after 
Levinsen, 1909.) 
G-I. Tubucellaria hirsuta Lamouroux, 1S16. G. A part of the surface of the zooecium. The 
ascopore is seen distally. H. Operculum, X 75. I. A separating wall with septulae, the position 
of which is at the proximal end of each of the thread-shaped appendages; X 200. (G-I after 
Levinsen, 1909.) 
J. Tubucellaria zanzibarensis Waters, 1907. Operculum. X 85. 
K. Tubucellaria fusiformis D’Orbigny, 1852. Operculum, X 85. (J, K after Waters, 1907.) 
Genus TUBUCELLARIA D’Orbigny, 1852. 
1852. Tubucellaria D’Orbigny, Paleontologie francaise, Terrain Cretace, vol. 5, Bryozoaires, 
p. 335. 
The zoarium is articulated and radicellated. The operculum is simple and 
separable. No vestibular arch, no avicularia. 22-27 tentacles. 
Genotype. — Tubucellaria ( CeTlaria ) cereoides Ellis and Solander, 1786. 
Range. — Lutetian — Recent. 
The oldest species is Tubucellaria fragilis Michelin, 1845, from the French 
Lutetian. In Europe the known Oligocene species are rather confused and do not 
permit useful comparisons with the American forms; their occurrence, moreover, 
is very rare. 
