99 
V1Z ■ *35 A equal on all sides of the axis. On the larger branches the regularity of the 
distribution disappears; on the stem the spines are very rare. The Annelids, 4 or 5 in number, 
have left the tube and are twined around and between the branches. 
The description of Parantipathes columnaris Duch. by Brook is in almost every point 
like that of the Siboga-specimens, except that in the latter ones the principal branches are not 
placed in verticils, and that the spines are not always so very short. The transversally elongated 
mouth is not very well in accordance with the sagittally elongated mouth in Brook’s generic 
diagnosis of Parantipathes , but, next to the variability of the mouthslit in other species, it 
should be kept in mind that it is more probable that an elongation of the polyp in a /rapsversal 
direction, as it is shown by these specimens, is more often accompanied by a transversally 
elongated mouth than by a sagittally elongated mouth. Perhaps it will be better to omit the 
shape of the mouth from the generic diagnosis. 
Diagnosis: 
Colony: Bottle-brush-type. Branches in verticils or irregularly distributed 
on all sides. Secondary and tertiary branches in verticils. Stem visible through¬ 
out the entire colony or in its top-part dissolved in branches. Frequent fusions. 
Wormtubes composed out of a regular network of connections, parallel or at 
right angles with the stem. Stem included in the.Wall of the tube. 
Spines: 4-—5 longitudinal rows on the youngest part of the ultimate bran¬ 
ches; on the older parts entirely irregular distribution. Mutual distance 180— 
375 A Length 50—135 p, equal on all sides of the axis. Smooth; dwg^illy inclined. 
Polyps: Slightly elongated on the older branches, mfWi elongated 
on the younger branches. Tentacles max. length 225 p—I n t e r p o 1 y p a r dis- 
''* 4 ' 
tance max. 2.1 mm. Oval oral cone, higher in its distal and in its proximal 
part. Mouth transversally elongated. 
Former habitat. Duchassaing : Guadeloupe, 35 — 50 fm.; Pourtales : Martinique, 
Dominica, Virgin Gorda, St. Lucia, St. Vincent, Grenadines, Barbados, Guadeloupe (16 stations 
on depth of 73—861 fm.); Silberfeld : x^merika. 
2. Parantipathes ip) tristicha sp. n. 
Stat. 173. 3 0 27'S., i3i 0 o'-5E. Ceram-sea. 567 M. Fine, yellow grey mud. 1 spec. 
This complete colony has a small, inconspicuous, basal plate. The height of the colony 
is 9 cm. The first 0.7 cm. is unbranched; the rest is very regularly » 
branched. The basal diameter of the stem is 550 p, which value 
increases slightly, before it tapers gradually towards the top. The 
stem is nearly straight and only very slightly curved backwards. — 
In the first place there are two longitudinal rows of branches (fig. 
C) ^alternating r^rrnlarUz fn rirrlif- anrl fliF* Ipff Tn thp 
/. 
lower half of the colony both rows of branches are lying in the same Horizontal projection of the branches 
. (schema). 
plane, but in the higher part of the colony their planes are at an 
obtuse angle of 130°, on the concave side of the colony. The length of these entirely unbranched 
(schema). 
t 
