87 
Fia 
—O——i>-^——f^-E>— 
71. Aphanipathes Sibogae sp. n. Polyps on the 
ultimate branches; 14 X- 
Fig. 72. Aphanipathes Sibogae sp. n. Polyps on one of the 
basal fusions; 14 X- 
almost flat and invisible. The diameter of the mouth, opened, is 0.2 mm. — The interpolypar 
distance is 0.3 mm., which value is rather variable; on 
the ultimate branches the polyps are somewhat more 
crowded. Between the polyps the transversal groove in 
the coemenchyma is often clearly visible (figs. 70, 72). 
The thin coemenchyma is transparent milkwhite with 
numerous opaque white spots, 30 — 40 ;j. in diameter. The surface of the tentacles is covered 
with warts but the spots are only very seldom 
separately visible. 
On the older parts of the colony there is 
no degeneration of the polyps to be observed. 
It is true that the mouth 
■Q < \ 2 >. is often shut and the oral 
cone flat, but there are without any doubt numerous polyps on this 
Fig. 73. Aphanipathes Sibogae basal parts, which are in every respect like those on the younger 
bP 'basJi 0l fusion^-°i4 \ the b r£inc I ies 5 the tentacles are even longer and larger than on the younger 
parts of the colony. Only the number of the polyps is diminished. — 
On the older parts even young polyps occur between the adult ones (fig. 72). The warts and 
the white spots are less clear and the spines are shorter. — On many parts of the older branches 
the longitudinal groove on the back of the polyps is still clearly visible. 
Diagnosis: 
Colony: densely branched, in a thick plate; stem very swiftly tapering, 
branches not. Angles of 90° between the branches. Very frequent fusions 
in all parts. Ultimate branches straight, others curved. 
Spines : at right angles with the axis, with smooth surface; 4 longitudinal 
rows. Mutual distance 330 — 450 p„. Length 150 p. 
Polyps: length of cylindrical tentacles 0.3 mm., all subequal. Rather 
low oral cone; mouth irregularly round. Interpolypar distance ± 0.3 mm. 
2. Aphanipathes undulata sp. n. (PI. VIII, fig. 8). 
Stat. 305. Solor-strait. 113 M. Stony bottom. 1 spec. 
This fanshaped colony, branched in a plane, is complete. Height 20 cm.; greatest breadth 
35 cm. The branching begins immediately at the base itself, where three equivalent stems 
originate, the middle one of which is only 14 cm. long, while both the others are much longer. 
A fourth stem, properly speaking a basal branch of the right stem, is snapped off at a length of a 
few cm. The middle stem has a basal diameter of 3 mm.; the other ones respectively 4.5 and 5.5 mm. 
This last ones are repeatedly branched before showing the same mode of branching as the middle 
stem. — The stems are sinuous; the branches are not inserted in a regular manner, except for 
their lying in the same plane as the stems. Often the larger branches are inserted especially on the 
convex side of the branch which bears them, but this is not the rule. The greatest number of the 
