ON RECENT POLYZOA. 521 
Family VI. Bicellaride. 
In the family group bearing the above name Mr. Busk (‘ Crag 
Polyzoa,’ p. 15) placed three genera—Bicellaria, Halophila, and Bugula. 
fr. Hincks, in the ‘ Brit. Mar. Polyzoa,’ retains the family name which 
includes the following genera :— 
’ : Genus Bicellaria, Blainville ; Genus Beania, Johnston ; 
3 »  Bugula, Oken; 
+ 
4 remarking that the first and last of the three are linked together by the 
genus Bugula and the genus Diachoris. . . . D. Spinigera, Macgil, .. . 
_ inayoung state . . . is hardly distinguishable from a Beania, pp. 65, 66. 
; In his paper (Contributions towards a General History of the Marine 
- Polyzoa, ‘Ann. Mag. Nat. Hist.’, February 1881, p. 157), Mr. Hincks 
includes in the family, Diachoris, Busk. 
_ Inthe ‘Challenger Report,’ Mr. Busk adheres to his original family 
_ name, but he adds to the number of the genera by including Kinetoskias, 
‘Koren and Dan., and Ichthyaria, Busk. 
_ ‘Zocecia, rather loosely united in two or more series, or disjunct ; 
bconic, or boat shaped, the aperture usually occupying a large proportion 
pf the front.—Avicularia, when present, capitate; pedunculate, and 
joimted. Zoarium not articulated ; erect and phytoid, or composed of a 
‘number of cells connected by tubular processes.’—Hincks, p. 64. 
In the ‘ Challenger Report,’ Mr. Busk describes the character of the 
family somewhat different from the above :— 
_ Zocecia turbinate or sub-turbinate, biserial, the two series more or less 
‘disjunct. Aperture large, directed obliquely upwards. Avicularia, when 
Present, usually pedunculate and capitate or trumpet shaped; rarely 
Sessile, not articulated, and placed either on the anterior or posterior 
aspects. P. 32. 
Genus 16. Bicellaria, Blainville. 
‘Zoarium erect, phytoid. Zocecia turbinate or in the form of a cornu- 
copia, loosely united, more or less free above ; aperture looking more or 
less upward, directed obliquely inwards below; inferior portion of the 
cells sub-tubular, usually much produced. Avicularia, when present, 
jointed and capitate. No vibracula.’—Hincks, p. 66. 
1. Bicellaria ciliata, Linn. Hincks, p. 68, pl. viii. figs. 1-5. 
British form, but it has a rather restricted geographical 
range, including North America (Kirchenpauer), and a 
, variety in South Africa (Hincks). 
. Alderi Busk, Hincks, p. 70, pl. ix. figs. 3-7 
= B. unispinosa, Sars. 
Both the Brit. localities and also the geographical range 
i of this species are restricted. 
- a gracilis, Busk, ‘ Brit. Mus. Cat.’ 
4, a grandis, ,, «bid. 
5. a tuba, »  tbid. p. 42, pl. xxxi. 
Australian forms. In B. tuba there is a fixed avicularium borne at the 
top of a tall spinous process ; consequently, as Mr. Hincks remarks, this 
ecies forms an exception to the latter part of the diagnosis of the genus 
8iven above. ‘ Avicularia,’ &c. 
