8 4 
Four limp flattened colonies, from Station 258 and an unrecorded locality, all show the 
same colouring — the stem and branches a grey-cream colour and the polyps an orange yellow. 
Under a lens the polyp is seen to be sulphur yellow, while the spicules of the supporting bundle 
are yellow tinned with red, thus giving- a more orange colour to the whole. The largest of 
these colonies has a height of 11 cm. and a spread of 6.5 cm., and the walls of stem, branches 
and twigs are all collapsed. 
Two colonies from Station 273 have an orange-coloured stem fading to pale yellow on 
the twigs, and orange-coloured polyps. The spicules of the supporting bundle are again yellow 
tinged with red. The taller very well preserved specimen, 12 cm. in height with a spread of 
7 cm., has a membranous base spreading over stone, and this basal membrane is colourless, 
the orange colour only beginning with the actual stem. The two specimens are at first glance 
very dissimilar in mode of growth, as one is fully expanded, with the walls of the twigs not 
collapsed, (as was the case in the specimens from Stat. 258), while the other specimen is very 
fully contracted, with the cortex of the branches and twigs showing transverse wrinkles, while 
the polyps have become more densely crowded on the lappets. 
Several other colonies, from Stat. 258 and Stat. 164, and an unrecorded locality, show 
grey-cream coloured stems, frequently tinged with pink towards the tips of the branches and 
twigs. This is due to red spicules in the cortex, while the polyp is white with colourless antho- 
codial spicules and with a red supporting bundle. One colony from Stat. 258 is intermediate 
between the orange and the red types, with orange anthocodial spicules and a red supporting 
bundle. The pinkish forms show exactly the same armature of the polyps and general spiculation 
of the stem, branches, and canal walls as in the orange colonies. 
Previously recorded from Red Sea, Pacific Ocean (Java-Sea, Celebes, Ternate, New 
Guinea, Chinese Sea). 
4. Nephthya cohnnnaris Studer. 
For description see: STUDER, Mitth. geogr. Ges. u. naturh. Mus. Liibeck (2) Heft 7 and 8, 
p. 125, 2 figs. 
Stat. Unrecorded. 
A limp, cream-coloured, very expanded colony, with a total height of 14 cm. and a 
spread of 7 cm., can be referred to this species. The sterile stem divides at a height of 2.7 cm. 
into several long branches which give rise to twigs bearing the polyp-covered lappets or 
directly to the lappets themselves. The lappets are conical with rounded tips. The polyps are 
borne at almost right angles to the supporting bundle; this consists of warty spindles, one or 
sometimes two of which may project slightly. The polyp armature consists of about 5 pairs of 
spindles indefinitely arranged in chevron rows, and very much weaker and more irregularly 
disposed ventrally. The spicules of the upper rind are slender thorny spindles. In the basal rind 
there are coarser spindles with the thorns frequently more strongly developed on one side. 
These types pass into jagged irregular thorny forms. In the canal walls lie massive finely 
thorned spindles up to 1.2 mm. in length. 
Previously recorded from Pacific Ocean (Dongala, Celebes). 
