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warted spindles is 0.6 by 0.1 mm. What is divergent in this form is the cylindrical stiff stalk, 
much narrower than the capitulum. 
Another young colony from Amboina Reef, like a button-mushroom, of a white colour, 
has a total height of 1.8 cm., of which 1.5 is stalk. The other dimensions of the stalk are 1 cm. 
by 0.8 cm. The diameters of the capitulum are 2 cm. and 1.6 cm. While the spicules are quite 
typical of A. glaucum , it should be noted that the siphonozooids, which are very numerous, are 
anything but distinct. This is another indication of the unimportance of such characters in clas¬ 
sifying these forms. 
Two other young colonies from Laiwui, Obi, of the button-mushroom type, of a brown 
colour, with very distinct siphonozooids, have the following dimensions. The larger is 1.5 cm. in 
maximum height, of which 0.9 cm. is stalk. The diameter of the stalk is 0.7 cm. The diameter 
of the capitulum is 2.2 cm. The smaller specimen has a maximum height of 0.8 cm., of which 
0.3 is stalk. The diameters of the stalk are 1.1 cm. and 0.5 cm; those of the capitulum are 
2.5 cm. and i.Scm. There are among the stalk spicules a number of broad, heavily warted, 
blunt-ended forms inclined towards the type that we regard as characteristic of A. trocheliopho- 
rum , but the great majority agree with Marenzeller’s figures of S. glaucum. 
A small rather dried and hard specimen from Station 282, with a total height of 2.1 cm. 
and a small head, with a diameter of 8 mm., in which there is a notch on one side, has large 
spicules the majority of which are covered with simple prominences. Some however are covered 
with large compound warts. 
Another very similar little brownish specimen from Station 273, with a brown stem 7 mm. 
in height and a disc, 7 mm. in diameter. The autozooids are crowded round the edge, 3 mm. 
apart in the centre, where there are up to 5 siphonozooids between each. These are very clearly 
seen. Also a similar small broken and dried colony from Amboina. 
A small specimen from Station 142, Laiwui, Obi, agrees generally in its spiculation, but 
the large spindles of the stem do not exceed 0.85 mm. in length. Moreover the surface of the colony 
is rather leathery and in stiffer folds than in typical specimens. But a firm surface is noted as 
occurring in S. mycetoides , which is included by Kukenthal within S. glaucum. The folding of 
this specimen from Station 14 is like that of Schenk’s S’, plicatum , also included by Kukenthal 
within S', glaucum. 
Another colony of the button-mushroom type is 1.4 cm. high, with a disc 6.5 mm. in 
diameter. The siphonozooids are quite distinct. The largest of the warted spindles observed had 
a length of 0.7 mm. The colour is creamy grey. 
Interesting on account of its form is a specimen from Bima, which consists of a narrow 
stalk about 9 cm. in height and 1.3 cm. in maximum width, and a disc, unfortunately broken, 
which probably had a diameter of about 3 cm. This obviously diverges from the ordinary form, 
but the spicules are quite typical. 
Very strikingly different is a luxuriant colony, from Station 258, which we have figured. 
From a very short basal portion there rises a great horse-shoe-like capitulum with a much folded 
margin. The span from side to side is about 16 cm., the other diameter of the capitulum is 
12 cm., while the height of the whole is only about 3.5 cm. 
A small colony from Station 60 illustrates the variability of these species of Sarcophytum, 
