CELLULAEINE AND OTHER POLYZOA. 299 
Bicellaria ciliata as the genotype. Pre-oceupied by Bicellaria, Macquart 
(Diptera), 1823, Rec. Trav. Soc. Amat. Sci. Lille, Annees 1819-1.S22, p. 155, 
and replaced by Bicellariella, Lev., 1909 {q.v.). See also Bugulu. 
Bicellaviella, Levinsen, 1909, p. 431. — Proposed to replace Bicellaria, de Blainville, 
1830, pre-occupied (see Bicellaria), with genotype Bicellariella ciliata (see 
p. 110). 
Bicellarina, Levinsen, 1909, p. 99. — Genotype (the only species), Bicellarina alderi 
{Bicellaria alderi, Busk, 1860, Q. J. M. S. viii. p. 213). 
Bifrons, MacGillivray, 1860, Trans. Phil. Inst. Vict. iv. p. 163. — Proposed to replace 
Bimetojna, Busk, 1852, at Dr. Mueller's suggestion, on the ground that 
Bimetopia is used iu Botany (Umbelliferse). The alteration is not required by 
the accepted rules. 
Brettia, Dyster, 1858, Q. J. M. S. vi. p. 260. — Genotype (the only species), Brtttia 
pellucida, Dyst., n. sp. 
Bugula, Oken, 1815, p. 89. — Genosyntypes, Cellularia neritina. Cell, ciliata, and 
Bugula avicularia (authorities not cited). Linnseus (1758, p. 809) founded 
Sertularia avicularia primarily on. the biserial species figured by Ellis (1755, 
pi. 20. fig. A), and to this species the Linnean name is now restricted ; but he 
also included the pluriserial species of the same author {t. cit. pi. 38. 
fig. 7), though wrongly citing the Plate as 28. Gray (1848) made *§. avicu- 
laria (s. str.) the genotype of a new genus, Bugulina (p. 114), while (p. 106) 
he described the pluriserial species of Ellis, whose Plate is wrongly cited as 
58, as Avicularia Jiabellata (Thompson, MSS.), A.Jlahellata being the genotype. 
He appears to have overlooked the fact that Okeu described G. avicularia as 
having its zocecia in 3 or 5 series, as he includes Oken's species in his synonyms 
of Bugidina avicidaria, whereas it should properly have come under Avicularia 
jlahellata. B. neritina, B. avicularia, and B. flabellata are congeneric, what- 
ever the generic name adopted for them. 
In 1819 Schweigger made Serttdaria neritina, L., the genotype of Acaniarchis 
(q. v.), to which S. avicidaria, L., and Avicularia fabellata (Thompson, MSS.), 
Gray, might also be considered to belong. This would necessitate regarding 
S. ciliata, L., as the genotype of Bugula, a course which would introduce the 
greatest confusion into nomenclature. I regard this as an instance in which 
it is essential to disregard the strict application of the Pules of Nomenclature 
and to accept Hincks' selection (18S0, p. 75) of Bugida neritina as the geno- 
type of Oken's genus. As this species is also the genotype of Acamarchis, it 
becomes necessary to choose between the two genera. I give the pi-eference 
to Bugida, partly because it antedates- AcamarcJiis by a year, and partly 
because it has been universally accepted. As a further motive, it may be 
pointed out that A. neritina, in its typical form, is devoid of avicularia, and 
that certain writers have accepted Acamarchis as a genus differing from 
Bugula by the absence of these organs. See also Bicellaria. 
Bugidaria, Levinsen, 1909, pp. 99, 108. — Genotype (the only species), Bugularia dis- 
similis (^Carbasea dissimilis. Busk, 1852^, p. 51). 
