54 
XX>^ 
Js — 
V 
cc 
Fig. 29. Euantipathes dickotoma (Pall.) n. n. 
a Spines, b polyp; a 52 Xj b H X- 
1.75 cm. the first branch appears. The further stem, as well as this branch itself, bears branches 
(five in number) in the same manner, with a mutual distance of i—3 cm. They are over 1 cm. 
in length or so long that they end on the same level as the stem. Although the first fork 
indicates a plane which remains obvious, the other branches are inserted in every possible direction. 
The fork-angle is 30° — 45 0 . 
The spines (fig. 29 a) are triangular, with their distal side usually somewhat steeper than 
their proximal side. There are four longitudinal rows, alter¬ 
nating in a slanting quincunx; the mutual distance in a row 
is 300 [j.. The surface of the spines is smooth ; their length, 
subequal on all sides of the axis, is 50 p„. — 1 he spines 
remain regularly distributed to near the base of the colony. 
The polyps (figs. 296, 30, 31), inserted in a single 
series, are not confined to a special side of the colony. Their 
colour is grayish brown. The proximal pair of lateral tentacles 
is strikingly larger and more strongly built than the distal 
pair of lateral ones (fig. 30, a and c). The sagittal tentacles are inserted on a lower level 
than the lateral ones. All tentacles are inclined distally in a high degree, so that the oral cone 
is partially covered by the proximal lateral tentacles. 
The oral cone itself is elongated in a transversal 
direction and its distal part is often higher than 
its proximal part (fig. 30#), while the middle part 
is indented also; sometimes the form is more rounded. 
The mouth, which is also transversally elongated, 
is sometimes proximally wider than distally (fig. 30 a). 
The length of the proximal lateral tentacles is 
0.55 mm., of the distal pair 0.225 mm., of the 
sagittal ones 0.35—0.4 mm. All these dimensions 
may be larger or smaller in other polyps, but their 
mutual proportion remains the same. — The inter- 
tentacular distance is 1.9 mm.; the height of the oral cone is 0.25—0.3 mm. On some parts 
of the colony the polyps are as figured in fig. 31, more transparent while the difference between 
the two pairs of lateral tentacles is less conspicuous, 
and they are not so much distally inclined; also the 
oral cone is distally nearly as high as proximally. — 
The spines are dimly visible through the coenenchyma, 
but not through the polyps. — All polyps clearly show 
their convoluted masses of mesenterial filaments, which are conspicuous by their excessive 
pigmentation, through the body wall (fig. 31). 
Alternating with the adult polyps young ones occur. — Some polyps have become very 
large and sit as thick knobs on the branches; in this case it is difficult to discern the separate 
tentacles. — In one of the colonies the transversal groove between the polyps is very conspicuous. 
Fig. 30. Euantipathes dichoto?na (Pall.) n. n. a, b , c Polyps ; 14 X- 
Fig. 31. Euantipathes dicliotoma (Pall.) n. n. Polyps: 14 X- 
