34 
THE VOYAGE OP H.M.S. CHALLENGER. 
Habitat. — Station 147, lat. 46° 16' S., long. 48° 27' E., 1600 fathoms, Diatom 
ooze. Station 156, lat. 62° 26' S., long. 95° 44' E., 1975 fathoms, Diatom ooze. 
The trumpet-shaped avicularia are but rarely developed ; they differ from those on 
Bicellaria spatulata in their much smaller size and the more oblique truncation of the 
terminal surface ; all the avicularia have a peculiar vertical posture. The specimens from 
Station 156 differ in some respects from the others; they are extremely soft and flaccid, 
containing apparently but very little calcareous matter ; and the zooecia are usually with- 
out any spines or with a very short and blunt one behind ; the angularity, moreover, of 
the outer border of the aperture is more marked, and the dorsal avicularia rather larger. 
This may be regarded as a variety, Jlaccida. The size of the zooecia is much greater in 
the var. jlaccida, in which they appear to attain the greatest dimensions as yet noticed 
in the genus (0" - 06 x ’02), the former dimension being the length of the tubular portion 
between the two joints, and the latter being the width of the body. 
(4) Bicellaria bella, n. sp. (PI. VI. fig. 3). 
Character. — Zoarium about 1-| to 2 inches high ; branches irregularly forked, with 
short lateral feathered secondary branches. Zooecia tubular, very long, and slender 
below, suddenly widely expanding above with an oblique, irregularly angular aperture, 
which is prolonged a short way at the outer angle into a digitiform process which projects 
in front and supports usually six very long curved spines ; and on the back of the zooecium 
is a row of six to eight also very long spines curving forwards. A small infundibuliform, 
shortly pedunculate, erect, avicularium (fig. 3b) is articulated close below the inner 
border of the aperture in front ; sometimes a second avicularium of the same kind is 
found on the front of the same zooecium, and occasionally one of rather smaller size may 
be seen attached to the side of the digitiform process near its point. 
Habitat. — Station 196, lat. 0° 48' S., long. 126° 58' E., 825 fathoms, hard ground. 
(5) Bicellaria moluccensis, n. sp. (PI. YI. fig. 4). 
Character. — Zoarium 3 or 4 inches high, branches long, straight, forked at an 
acute angle, feathered. Zooecia tubular, length between the nodes about 0" - 03 ; body of 
zooecia about 0"’02 x ’01 to ’015. Aperture ovate, expanded towards the upper part; 
upper border wavy. A digital process projecting rather in front, supporting four or five 
long, curved spines. A long articulated spine behind towards the outer end of the 
zooecium, and a small, upright one near the inner end. A large, circular cup or disc in 
the middle of the dorsum, from which springs, with a much contracted base, a long tubi- 
form avicularium, of nearly equal calibre throughout, and with the wall very faintly ringed. 
