i 6 
Stat. 248. Tiur-island. Up to 54 M. 
Stat. 250. Kur. Reef. 
Stat. 299. io° 52 / .4S., 12 3 0 1r E. 34 M. Mud, coral and Lithothamnion. 
Stat. 301. io°38 / S., I23°25 / .2E. 18— 45 M. Mud, coral and Lithothamnion. 
Stat. 303. Haingsisi. Reef. 
The specimens of this species are very numerous broken up colonies of which it is impossible 
to make a count. 
There has now to be added to the genus Hicksonia another species Hicksonia kollikeri. 
Several colonies of unusually large polyps we considered at first to be a new species of 
Clavularia. On further examination it was found that, though not so obvious in many of the 
specimens, the main distinguishing feature of the genus Hicksonia, namely the connecting stolons, 
was present. Some of the specimens seem to be young colonies with the polyps in process of 
becoming connected together by the stolons. There are also colonies of full-grown polyps which 
have no connections. As noted by Delage and Herouard (1901), Professor Hickson found on 
the Celebes reefs full-grown specimens of H. viridis with no connecting tubes. 
Many of the polyps are budding off small tubular stolons which arise at various levels 
from the calvx wall, though mainlv from the lower half. Some of these have grown long enough 
to touch the body wall of a neighbouring polyp, but as yet have made no connection ; the end 
of the stolon is merely firmly pressed against the wall. Other polyps are actually joined together 
by a stolon. In other cases a new polyp arises from this stolon, sometimes before the connecting 
stolon has joined up with another polyp, and while one end is still free. 
The polyps arise from a complicated, irregular stolon which branches and forms a network 
in different planes; it frequently appears as if a stolon arising from the lower half of a polyp 
is really part of the ramifying basal stolon. 
The polyps are substantial, many of them with a calyx of 20 to 29 mm. and with an 
apical diameter of 5 to 10 mm. The basal diameter is much less, generally about 2.5 mm. 
Many of the anthocodial upper portions of the polyps are completely retracted. The anthocodiae 
are soft and membranous, but show eight hard ridges of the small, longitudinally-disposed 
spindles which tend to chevron arrangement at the base. In each ridge there are 4 to 6 pairs 
of these spindles. The tentacles bear on each side 16 to 20 simple pinnules in two rows. 
When the tentacle is in a contracted condition the pinnules crowd together, giving an appearance 
of numerous rows. The calyx is heavily armoured along the greater part of its length, but is 
generally softer and more flexible near the top. The rigidity of the whole varies considerably 
in different specimens. Eight main indistinct ridges can be seen, with further minor longitudinal 
striations. The colour in spirit is a greenish cream. No record is given of the colour of the 
living polyp. 
The spicules of the calyx include the following forms : 
[а) long delicate spindles with relatively few low conical warts; maximum length 2 mm.; average 
breadth 0.06 mm.; some of the smaller of these are almost smooth; 
( б ) stout spindles densely covered with compound warts, many showing bifid or branched ends; 
0.8 X 0 - 1 5 mm.; maximum length 1.4 mm.; average breadth 0.13 mm.; 
(y) irregular much divided forms, which interlock like those of some Telestos. A common size 
is 0.4X0.17 mm. (between the tips of the branches). 
