17 
The spicules of the anthocodia and tentacles include the following forms : 
(а) some very minute discs. Average diameter 0.015 mm.; 
( б ) more numerous small *rodlets. Average dimensions 0.06 mm. X 0.02 mm.; 
(c) straight and bent finely-warted spindles, some with the ends warted and branched. Average 
dimensions 0.85 mm. X 0.07 mm - 
Some specimens from Lombok (5 to 12 fathoms) have the spindles of the calyx and the 
anthocodia so markedly branched and frayed at the ends that at first we considered them to 
represent a third distinct species. In view of the fact, however, that in the specimens described 
above as H. kollikeri the spindles occasionally branch, and that in other respects the specimens 
with frayed spicules agree closely with H. kollikeri , what is merely a difference in the degree 
of branching does not seem to warrant separating them into another species. 
In these specimens the average height of a calyx is 28 mm. The apical diameter is 
about 7 mm., and this gradually tapers to a basal diameter of 2 mm. The general shape is 
club-like. The calyces rise in a thick crowd from a basal membrane and are practically touching 
one another. On the retracted tentacles there are crowded short pinnules, which leave no bare streak. 
The spicules are very remarkable. They include the following : — 
1.2 X °- 1 mm. 
on average. 
<_> 
0.6 X °- 2 mm. 
b) 
'(3) 
(4) 
1.1 X 0.05 mm. — (5) 
1.3 X 0.06 mm. —- (6) 
0.23 X 0.03 mm. — (7) 
0.06 X 0.02 mm. — (8) 
broad straight spindles densely covered with compound warts; 
the same curved ; 
the same curved, and with bifid, trifid, and irregularly branched ends; 
the same curved, and with high compound prominences arising about 
the middle; 
slender, narrow spindles with low smooth prominences; 
slender warty spindles, bifurcate at one or both ends; or with 3 or even 
4 branches; 
minute rodlets, slightly rough, from the tentacles; 
very minute finger biscuit forms from the pinnules. 
Some other specimens (from Station 315) which we also refer to H. kollikeri have calyces 
3 cm. in maximum height, with a protruding retractile portion of about 3—4 mm. They are 
therefore as large as those from Lombok, but do not show the abundance of terminally much 
branched spindles. A comparatively small number of spindles are slightly branched at their tips 
or at one tip, as also occurs in H. viridis. The calyx is so densely armoured that it acquires 
considerable rigidity. The retractile part is heavily armoured with eight vertical spiculose bands, 
consisting of longitudinally disposed spindles, with several rows in each band. In some cases the 
irregular growth of the basal stolon suggests a Telesto-like mode of origin of the polyps, and 
some of the irregular interlocking spicules are very like those of Telesto. These specimens in 
particular suggest an affiliation of Telesto to a Clavularia type as very probable. 
Numerous very fine specimens from Kur show very markedly a somewhat trumpet-like 
shape of polyp. Thus one of the largest, with a height of 32 mm., had an oral breadth of 7 mm., 
whereas the base rising from the stolon was only 2 mm. across. One of the broad tentacles 
6 mm. in length, shows a triangular bare streak, about 0.7 mm. in maximum breadth, on each 
surface, and on each side of that three rows of about 16 pinnules, the longest about 2 mm. in length. 
SIBOGA-EXPEDITIE XIII d. 
3 
