1 75 
different length on opposite sides of the axis (150 p. and 90 p); mutual distance 
450 p; number of longitudinal rows 10 (Brook 3—4). 
Polyps : unknown. 
Former habitat: Brook: locality unknown. 
Hillopathes g. n.’). 
1. Hillopathes ramosa (v. Pesch). 
Cirripathes ramosa v. P. VAN PESCH, Bijdr. t. d. kennis v. h. genus Cirripathes, p. 40, etc. 
Stat. 313. Saleh-bay, East of Dangar Besar. Up to 36 M. Sand, coral and mud. 2 spec. 
One of this specimens is a fragment without polyps; length 38 cm. It is curved in a 
part of a circle; the first 3.5 cm. are separated from the rest by an angular bend (135 0 ). The 
axis is irregularly, almost imperceptably sinuous, with small curves. The basal diameter of 3 mm. 
scarcely tapers; the broken top is more than 2.75 mm. in diameter. The axial canal is only 375 p 
in diameter. I he spines (fig. 251) are slightly distally inclined, while their distal side is at right 
angles with the axis with the short spines, and nearly so with the 
long ones. The apex is blunt with the large spines, but acute with 
the short ones. The surface of the spines is smooth and shows a very 
fine granular structure. The spines are arranged in a rather irregular 
manner, but never entirely irregular. On large parts of the axis the 
longitudinal rows are clearly visible, but now and then they are upset 
by the splicing, diverging, and reuniting of rows. Besides there are 
spines irregularly distributed between the regular rows. There are 10 
longitudinal rows, alternating in a straight quincunx; mutual distance 
of the spines usually 440—500 p; length 390 p and 255 p on opposite 
sides of the axis. 
The second specimen is very sparingly dichotomously branched. 
The length of the axis to the first branching is 61 cm.; one of the branches of the bifurcation 
is 33 cm. long, the other one 28 cm. The greater part of the axis is covered with polyps. 
The first 48 cm. of the fragment is curved in a half-circle; the following 13 cm. are at 
an angle of 130° inserted on the preceding part by a rather thick node. The branches are 
curved (perhaps all the curves are partly caused by the preservation vessel). All parts are as 
irregularly secundarily sinuous as the first specimen, and provided with nodes. The basal diameter 
is more than 2.75 mm. (so that possibly the first specimen is the basal part of this specimen), 
which remains sub-equal as far as the first branching. One branch has a basal diameter of 
1.5 mm., increasing swiftly to 2.5 mm. with repeated diminuitions to a diameter of 2 mm.; on 
15 cm. from the end there is a node, with a swift diminuition to ± 1 mm. The other branch 
is 2 mm. in diameter, repeatedly increasing to 2.5 mm. and again diminishing; on 12.5 cm. 
from the top there is a node with a diminuition to 1.75 mm. and on a distance of 1.5 cm. 
from the top a diminuition to 0.75 mm.; 0.5 cm. further a broken stump ot a second 
Fig. 251. Hillopathes ramosa 
(v. Pesch). Spines on opposite 
sides of the top-part of the colony; 
58,5 X- 
1) Cf. the generic diagnosis on p. 23. 
