144 
Fig. 197. Stichopathcs saccula sp. n. Spines on 
opposite sides of the axis; 52 X- 
The spines (fig. 197) are blunt conical, at right angles with the axis, seldom slightly 
inclined. Their surface is entirely smooth or very finely granulated. In the higher part of the 
colony the spines are more distally inclined. The length, 
equal or subequal on every side of the axis, is 90—too u. 
at the base of the colony and 75—90 p. on the opposite 
side, with a mutual distance of 450 p„. On this basal part 
there are 11 longitudinal rows, which are not entirely 
regular; sometimes a quincunx is visible. — In the higher 
part of the colony there are less longitudinal rows: 8—9 after the third diminuition in diameter, 
and the distribution here is somewhat more regular. — Except for the base, the colony is 
entirely covered with well preservated polyps, 
arranged in a single series, with an inter- 
polypar distance of 2 mm.; they are very 
prominent and project far from the axis (figs. 
198, 200). The sagittal tentacles, which some¬ 
times stand off laterally from the axis, are 
inserted at an exceedingly lower level than the lateral ones. The latter tentacles are inserted 
on a very high oral cone with a sagittally elongated mouth, the walls of which are folded; 
sometimes the mouth is smaller and more rounded (fig. 199). The oral cone projects as a 
Fig. 199. Stichopathcs saccula sp. n. Polyps; 7.6 X- 
Fig. 200. Stichopathcs saccula sp. n. Back of the 
axis at a node; 7.6 X> 
dome above the insertion of the lateral tentacles, but this upper part may also be constricted 
at the base of the lateral tentacles, so that the mouth gets an outwards-turned lip (fig. 198). 
The entire cone is slightly distally inclined and it gives the polyps a baggy appearance (fig. 
198). I he sagittal tentacles are more than 1 mm. long, the lateral ones 0.6 mm.; there is no 
difference in length between the proximal and distal lateral tentacles. There are many young 
polyps inserted between the adult ones, but in an irregular manner; part of the colony shows 
the following mode of alternation (y — young; a = adult) : 2 a — y - a -y —2 a - y -2 a — y — a - 
y — 2 a — y — a — y — a — y — 3 a — y — a — y —3 a — etc. 
Diagnosis: 
Colony: irregularly curved; regularly tapering with, on some places, a 
swift diminuition of the diameter to an extent of a few hundred p„. 
Spines: upright, blunt, conical; rarely distally inclined. Smooth or slightly 
granulated. Length 75 —100 p. , with only a very slight difference on opposite 
sides of the axis. Mutual distance 450 p.. Number of longitudinal rows 8 — it. 
P olyps : large, prominent, bag-shaped through the large oral cone, which 
