550 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
“Zoarium continuous, radicate, branched, branches alternate, subcylindrical 
quadriserial, subsecund. Zooecia completely immersed below, flattened in front. 
Peristome tubular, extended. A circular median pore below the middle of the front. 
A large circular orifice (avicularian?) near the top of most of the lateral zooecia 
behind.” 
Genotype and only species. — Siphonicytara serrulata Busk, 1884. Recent, East 
Indies. 
Family CATENICELLIDAE Busk, 1852. 
Genus CATENICELLA D’Orbigny, 1852. 
CATENICELLA SUBSEPTENTRIONALIS Canu and Bassler, 1917. 
Plate 96. fig. 11. 
1917. Catenicella suhseptentrionalis Canu and Bassler, Synopsis of American Early Ter- 
tiary Cheilostome Bryozoa, Bulletin 96, United States National Museum, p. 63, pi. 5, 
fig. 5. 
The Catenicellidae are bryozoa peculiar to the southern hemisphere. They 
abound in the recent seas off Australia, and their fossil forms are frequent in the 
same region. However, Waters 1 discovered in the Priabonian of the Yicentin two 
species having some affinities with this family; namely, Catenicella septentrionalis 
Waters, 1891, and Catenicella continua Waters, 1891. According to Waters 2 the 
latter species is a Vittaticella and the first belongs to a new genus. 
The single and unique fragment found in America is very close to C atenicella 
septentrionalis Waters, 1891. It differs from it in its somewhat larger micrometric 
dimensions, more closely arranged frontal pores and in the presence of a small, 
oral avicularium. 
Occurrence. — Vicksburgian : Salt Mountain, five miles south of Jackson, Ala- 
bama (very rare). 
Holotype. — Cat. No. 62601, U.S.N.M. 
Family ADEONIDAE Jullien, 1903. 
Bibliography (Anatomical) .■ — 1889. Waters, Bryozoa from New South Wales, Annals Magazine 
Natural History, ser. 6, vol. 4, pi. 1, fig. 5. — 1903. Jullien, Bryozoaires provenant des campagnes 
de VHirondelle, pi. 14, fig. 4. — 1912. Waters, A structure in Adeonella (Laminopora) contorta 
Michelin, with remarks on the Adeonidae, Annals Magazine Natural History, ser. 8, vol. 9, 
p. 490, pis. 10 and 11.- — 1913. Waters, The Marine Fauna of Zanzibar, Proceedings of the 
Zoological Society of London, pi. 73, figs. 1-8. — 1909. Levinsen, Morphological and Systematic 
Studies of the Cheilostomatous Bryozoa, p. 282, pi. 14, figs. 1-5 ; pi. 23, fig. 9. 
The zooecia are provided with a compensatrix, but are devoid of spines and 
oral glands. The areolae are always closed and excavated out of the wall substance 
itself. The frontal is composed of an olocyst covered by a very thick pleurocyst. 
The operculum opens at the bottom of a peristomie. The female zooecia are of the 
kind termed gonoecia and are often larger than the others; they contain an ovicell 
1 North Italian Bryozoa, Quarterly Journal Geological Society, London, vol. 47, 1891, p. 5, pi. 1, figs. 1-8. 
2 Marine Fauna Zanzibar, Proceedings Zoological Society, London, 1913, p. 483. 
