I 
IOI 
the relation between this species and Eubathypathes (especially Eub. quadnbr .) is very near. 
Diagnosis: 
Colony. I wo iows ot simple branches, nearly in a plane, and a third 
double-numbered row of branched branches. For mode of branchino- c f 
figs. 97 and 98. 
Spines. On the blanches: distally inclined, smooth, acute, with an elong¬ 
ated base, in 4 longitudinal rows; length 225 y. and 130 y., mutual distance 
boo 75 ° i 1 - b)n the stem, knob-shaped, at right angles with the axis; max. 
80 y,; distance 150 y.; 3 longitudinal rows, but one half of the axis is smooth; 
spines often forming longitudinal crests. 
Polyps : Unknown. 
3. Parantipathes tenuispina Silberfeld. 
Parantipathes tenuispina Silb. SlLBERFELD, Japanische Antipatharien, p. 20, Taf. I, fig. 4. 
Stat. 289. 9°o'.3 S., 126°24.5 E. Timor-sea. 112 M. Mud, sand and shells. 1 spec. 
Ihis specimen, 13 cm. long, is curved and sinuous. The basal plate is not sharply 
defined and follows the irregularities of the underground. The stem is branched over its entire 
length, but in the higher part the branching is more dense. On a height of 2 cm. sits a branch 
of 6 cm. length. I he branches have a more blunt top than in Parantipathes columnaris. — 
The basal diameter of the stem is 0.75 mm., which increases to 1 mm. on a height of 4 cm. 
Then the diameter remains subequal, to diminish at the top. The large branch is subequal in 
diameter, viz. 0.75 mm. over its entire length. As to the other branches, they are nearly all 
of them simple; only a few have secondary branches, small in number and irregularly distributed. 
The primary branches are directed towards every side, always nearly at right angles with the stem. 
In their further course they are straight or slightly curved. The average length is 1.5 cm. on 
the side of the wormtube, and more than 1 cm. on the other side of the stem; so the exterior side 
ot this tube marks the virtual axis of the colony. The branches are crowded without regularity; 
they give to the colony a cylindrical shape with a diameter of 2.5 cm. and a blunt apex. 
The large branch bears many broken branches at right angles, and ditto secondary branches. 
The wormtube only follows the stem over the last 8 cm.; there are several Annelids 
assembled in the upper half of the tube, except the last 2.5 cm. 
The diameter of the tube is 4 mm.; its walls are built in the same 
manner as those of Parantipathes columnaris, with alternately regular 
and irregular structure. 
The spines (fig. 98 a ) on the top of the branches are blunt, 
and become only more acute (fig. 98 b) on a little distance from 
the top. They are irregularly distributed; sometimes 4 longitudinal 
rows are indicated, but only for a short distance. In such a row 
the mutual distance is more than 400 y.; otherwise this value is very variable. On the stem 
the distribution is entirely irregular. 
ct 
,.:.G ' 
-xr- 
Fig. 98. Paratitipathes tenuispina Silb. 
a Spines on the top of a branch; 
b Spines on the base of a branch; 
a, b 52 X- 
