4 6 
branches 0.9 mm. The tentacles, rounded and often with a broader base, show the regular 
rows of spots, which are not so very obvious through the white colour of the polyps. On the 
branches the polyps are very slightly elongated in the direction of the colony-axis, but this is 
not always the case. 
The second specimen of the same station is also complete as to the base, but the stem 
is broken after 1.75 cm. At an angle of 6o° the stem bears an almost straight branch of 
5 cm. length. The six left and right secondary branches alternate as regularly as in the other 
specimen, with a mutual distance of 2 mm. in a row, and inserted at an angle of ± 6o°; the last 
branch is the largest one. Their length is of an average 6 mm; some of them attain a length 
of i — 1.25 cm. All branches lie again in the same plane as the stem and the primary branch. The 
tertiary as well as the rare quarterly branches are all of them inserted at an angle of 6o° and 
directed towards the front of the colony, but inclined on the plane of the colony. Their length 
is 2 —4 mm. ; they are straight or somewhat curved, and spine-shaped. 
The spines (fig. 21) are arranged in five longitudinal rows, which alternate in a quin¬ 
cunx ; on the older parts of the colony there are more rows. The length of the spines is 120 p. 
on all sides of the axis; only the top of the spines is granulated 
(fig. 2 ia)\ the mutual distance in a row is 165 p„. — On the 
stem and the large branch the distribution of the spines is more 
irregular; on the base of the stem a very high degree of branching 
of the spines suddenly appears, giving a very 
bushy effect (fig. 21 6). Their length increases 
there to 750 p. and their surface is entire¬ 
ly smooth. Fig ' 22 ‘ ^ apathe * 7' 
The polyps (fig. 22) are the same as on an ultimate branch. 21 X- 
in the other specimens; on the branches the 
shape of the polyps is quite the same as on the stem, even on 
the more distal parts of the branches. The tentacles are knobby 
or sometimes rather elongated (0.5 mm.). The spines perforate 
the coenenchyma but not the polyps (fig. 22). 
The colony-fragment of station 100 bears branches, which diminish in length distally 
but not regularly (max. 1 cm.). They are arranged in two rows which are at a very obtuse 
angle with one another and wherein the branches regularly alternate to the right and to the 
left. Their mutual distance in a row is 2 mm. or somewhat less. Some branches are inserted 
well to the front of the colony. All branches bear branchlets of higher order, some mm. 
in length. The branches, also the secondary ones, are always inserted at an angle of 6o°. The 
secondary branches are spine-shaped and directed towards the front of the colony, usually 
somewhat inclined. 
There are 5 longitudinal rows of spines, alternating quincunxially. The length of the 
spines is 120 u- their mutual distance is 135 p.. Their top is slightly granulated, the base is smooth. 
On the stem the spines are aculeate, and some spines even show an inclination to have a forked 
top. The distribution of the spines remains regular. 
a pinnula; b spines on the base of 
the colony-stem; a, b 52 X- 
