554 REPORT—1885. 
Genus 49. Tubucellaria, D’Orb. and Macgil. 
Tubicellaria, Heller, Risso, Costa ; Onchopora (sp.), Busk. 
‘Zoarium composed of cylindrical, usually quadriserial, internodes,. 
articulated by flexible tubular peduncles, and arising either dichotomously 
from the extremity, or irregularly from the sides of the segment from 
which they spring. Zocecia pyriform, prolonged, and attenuated down- 
wards, ventricose above, and produced into a tubular peristome, bordered 
by a very thin septal ridge. A simple circular median pore (often ab- 
sent) in front, immediately below the tubular peristome. Surface reticu- 
late, scrobiculate, or simply and sparingly punctate.’— Chal. Rep., p. 99. 
The genus thus defined includes four known and well-marked forms, 
which, besides the sculpturing of the surface, possess the simple circular 
median pore. To these another species, provisionally named, is added by 
Mr. Busk, and this is sparsely punctured, and there is no trace of a 
median pore. The species are— 
1. Tubucellaria opuntioides, Pallas. 
i) cereoides, Hill. & Sol. 
45 hirsuta, Lamz. 
25 fusiformis, D’ Orb. 
is ceca, Busk (provisional). 
ors go bo 
Of these only 1 and 3 occur in the ‘ Challenger’ collection. 
1. Tubucellaria opuntioides, Pallas, ‘Chal. Rep.’ pl. xxiv. fig. 7; pl. — 
xxxvi. fig. 19 (pars). 
2. Tubucellaria hirsuta, Lame. ‘ Chal. Rep.’ p. 100, pl. xxxvi. fig. 18. 
Genus 50. Siphonicytara, Bush. 
‘Zoarium continuous, radicate, branched; branches alternate, sub-— 
cylindrical quadriserial, subsecund. Zocecia completely immersed below, 
flattened in front. Peristome tubular, extended. A circular median pore 
below the middle of the front. A large circular orifice (avicularian P)} 
near the top of most of the lateral zocecia behind.’—Chal. Rep., p. 101. 
Siphonicytara serrulata, Busk, ‘Chal. Rep.’ pl. xv. fig. 2. 
(For Genera 51? Lagenipora, Hincks; and 52? Celleporella, Gray, 
see ante, p. 553. For Genera 53? Rhyncopora, Hincks ; 54? Schizotheca, — 
Hincks ; and 54*, Mastigophora, Hincks, see p. 101.) 
Family XVII. Onchoporide, Busk. 
‘ Zoarium flexible, continuous, branched or lobate, ligulate or foliaceous, 
then unilaminar. Zocecia urceolate, ventricose. Orifice semicircular, with 
a straight entire lower lip. On the front, close below the orifice, a lunate 
fringed pore, and on each side an oblong or circular perforated disc, with 
a raised border.’—Ohal. Rep., p. 102. 
Mr. Busk justifies himself in separating this small group from the 
genus Microporella of Hincks, although a number of other forms possess 
a similar lunate pore combined with a similarly shaped orifice. It appears 
to me that Mr. Busk is perfectly right in the course he has taken ; but 
great credit, notwithstanding the separation, is due both to Mr. Hincks 
and to Mr. Waters on account of the calmly consistent manner in which 
species of the genus Microporella have been worked up.! 
1 Since the whole of this report was in the hands of the printer Mr. A. W. Waterss 
