on the upperside of the branch. All the spines are smooth. The spines at the top of the branches 
have the form of fig. 4 d. 
The second specimen of the same station, without base, has an unbranchecl part of 
5.75 cmf and a branched part of 4.5 cm., which at its top-part is again curved forwards. — 
The basal diameter is 105 p, which increases to 300 p. at the beginning of the branched part 
and afterwards to 315 p between the two first pairs of branches, to diminuate first slowly, 
than swiftly at the top. All the right branches (six and a little stump) are inserted 1.25 mm. 
higher than the left branches (seven). Their length is in the right row: (2.45); 3.7; 4.6; 5.2; 
4.8; 3.3 cm., and in the left row: 3.6; 4,2; 5; 5.5; 4.7; 3.8; 2 cm.; the distance between 
the branches in a row is for the right row: 7; 6.3; 6.3; 6.75; 5.3; 6 mm., and for the left 
row: 7.5; 6.5; 6.6; 6.6; 5.3; 6.25 mm. The angle between the branches of the lowest pair 
is 52.5 0 , increasing regularly to 150° by the highest pair, which is curved backwards and so 
lies in the same plane. The angle between branches and stem is 65°, which increases slightly 
towards the upper branches. On their further course they are curved towards the base of the 
colony. The base of the colony is wholly smooth; on a height of 3 cm. little spines put in 
appearance at the front of the stem, with a length of 20 p, and a distance of 345 p. — A 
short distance below the first branch the spines occur at all sides of 
the stem; there is no regularity except in four longitudinal rows. At 
the front of the axis the spines are slightly longer (30 p) than on 
the other side; the form is as in fig. 7 c. On the branches the spines 
(fig. 8 ci) are longer on the polypbearing side (30 p, and 15 p on the 
other side). Their distance varies to a high degree round 345 p; there 
CL 
are four longitudinal rows. 
Fig. 8. Eubathypathes fiatula (Br.) 
em. a Spines on a branch; b spine 
on the top of a branch; s, b 52 X- 
The polyps cover the stem and the branches except the unbranched part; they are 
placed on the front of the axis, somewhat directed upwards. The distance between the pairs 
of tentacles in the same polyp is the same as between two polyps: 2.2 mm. ihe tentacles are 
very long (max. 2.7 mm.) thin and transparent. The oral cone is well developed and has the 
form of a stunted cone. At some places the tentacles are not so long. 
The specimen of station 119 is without polyps. The form of the colony is the same as 
for the specimen of station 211. The unbranched part is 7.6 cm., and the branched part 3 cm. 
Just above the middle of the unbranched part the stem forms an obtuse angle. I he basal 
plate is elliptical (2.2 X 1.6 mm.) fixed to a calcareous needle; the dark centre (1 mm. diameter) 
is sharply separated from the lighter border. The basal diameter of the stem of 135 p. 
increases after 4 cm. to 255 p, to diminuate afterwards ; the top ends 8 mm. above 
the last branch. — The three right branches are long 3.1 ; 3.15; 0.25 cm. and the four left 
ones: 3.5; (1.35); 2.3; 0.7 cm. The distance is in the left row: 9; 6.25; 4.5 mm. and in 
the right row: 7:5; 12.5 mm. The angle between the branches of the first pair is 45 0 , of the 
second pair 90°. The angle between branch and stem is 70° by the first pair; 75 0 —80 by 
the following pairs. The lower branches are curved first distally and then outwards; the higher 
branches are first straight, then curved towards the base of the colony. I he spines are already 
present at the base of the colony and of the type fig. 7 b and r, with a varying distance of 225— 
5 , 
SIBOGA-EXPEDITIE XVII. 
