159 
4 
4 
Fig. 218. Eucirripathes spira¬ 
lis (Blainv.) v. Pesch. Arrange¬ 
ment of the spines (schema); 
the arrow indicates the direc¬ 
tion towards the colony-top. 
knobby, while the rest of the surface is finely granulated. Towards the top of the colony the 
spines are more slender and somewhat more distally inclined. On the top 
there are 7 longitudinal rows. The polyps (fig. 217) are arranged in 
several (even three) longitudinal rows, but they leave one side of the 
axis completely free. On some parts of the colony the number of polypar 
rows diminishes to two, or even to one. Young polyps are found between 
the adult ones. The yellow-grayish coloured polyps are to be discerned 
by the naked eye as separate polyps. The tentacles are short and knob¬ 
shaped; the sagittal ones are inserted at a greater distance from the oral 
cone than the lateral ones. Usually the low oral 
cone is distinctly visible, especially with the younger 
polyps, d he oral cone is without longitudinal stripes. 
I he colony of station 305, snapped of above 
the base, is 6.5 cm. high, and consists of a number 
of crowded spiral coils, from the base to the top. 
These 6 coils are sinistrorsal; the diameter of a coil 
is 2—3 cm,; each coil is secondary sinuous. The 
basal diameter of the axis is 1.75 mm., which value 
slightly increases (2 mm. in the middle of the second 
coil) to diminish afterwards gradually towards the 
rather blunt apex, the diameter of which is 1 mm. 
at a distance of only 1 mm. from the end. I he colony is grown in a 
slanting direction, so that the horizontal plane through the top is only 
slightly higher than through the base. The polyps, which are in good condition, are arranged 
all ot them on the distal outward side of the coils, always 
in a single series! (figs. 220, 221). The intertentacular distance 
is 0.75 mm. The sagittal tentacles of the same polyp are 
somewhat less than half a circumference of the axis apart; all 
the tentacles are short and often only knobshaped; the sagittal 
tentacles are the longest (550 p) and largest ones. The lateral 
tentacles are inserted at a much higher level than the sagittal 
ones and very crowded. The oral cone is small, with a round mouth (fig. 220). 
The spines (figs. 218, 219) are inserted at right 
angles with the axis or slightly distally inclined; 
they are cylindrical (diameter 110 p), blunt with their 
base not broadened. Their apex is covered with 
rough knobs and warts (fig. 219); the spines are 
arranged in 6 longitudinal rows, alternating in a 
straight quincunx; the rows of smaller spines are more crowded and 
7—9 in number, and even more, viewed from their side of the axis. 
I he longest spines can be found on the polyp-bearing side of the axis. Length 300_350 u 
Fig. 217. Eucirripathes spira¬ 
lis (Blainv.) v. Pesch. Part of 
a colony with three rows of 
polyps; 16 X- 
Fig. 219. Eucirripathes 
spiralis (Blainv.) 
v. Pesch. Top of a 
spine; 58.5 X- 
Fig. 221. Eucirripathes spiralis 
(Blainv.) v. Pesch. Polyps (profile); 
12.5 X- 
Fig. 220. Eucirripathes 
spiralis (Blainv.) 
v. Pesch. Polyps (oral 
view); 12.5 X- 
