542 



BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



Generic TaWe. 

 Zoariuin articulated. No avicularia-- Tutmccllarid. 



Zoarium fixed, bilarnellar. Avicularia very rare. Tubucella. 



Zoarium unilaniellar. Avicularia on each ssooeciuin__ ._ TuUporeUa. 



The prefix "tub" might well remain the characteristic of the family in the 

 creation of new genera. 



^=^ 



d^YK *> ' 



$$*$& K - 85 



o 



H .75 



I 200 



FIG. 160. Genus Tubuccllaria D'Orbiguy. 1S52. 



A-C. TubuceJlaria cercoides Ellis and Solander, 17S6. A. Portion of a zoarium, X 12. 

 B. Operculum, X 85. C. Operculum of var. chiiakcnsis Waters, 1907, X 85. (A-C after Waters, 

 1907.) 



D-F. Tultucellaria opuntioides Pallas, 1766. D. Portion of a zoarium, X 12. E. Aspect 

 of tue surface of a zooecium. The ascopore is seen distally. F. Operculum, X 75. (D-F after 

 Levinsen, 1909. ) 



G-I. TubiiceUa-ria tiirsuta Lamouroux, 1816. 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. Tu'bvcellana fusiformis D'Orbigny, 1852. Opereulum, X 85. (J, K after Waters, 1907.) 



Genus TUBUCELLARIA D'Orbigny, 1852. 



1852. Tubuccllarla D'OKBIGNY, 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. I \tlmcellaria (Cellaria) cereoidcs Ellis and Solander, 1786. 



Range. Lutetian Recent. 



The oldest species is Tubucellaria fra-gilis 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 A'ery rare. 



