28 
5 mm. ; breadth about i mm.). They also agree in the number and arrangement of pinnules. 
The tentacles bear three regular rows of short pinnules, the lower ones wartlike, those near the 
middle of the tentacle being the largest and most conical. The pinnules on the two sides leave 
a clear bare space in the mid-line in the lower half of the tentacles, growing more closely 
together in the upper portion. There are about io in each row. The tentacles are all somewhat 
contracted and we measured none longer than 2.2 mm. (Ashworth’s, 1.8— 3.5 mm. long). They 
agree also in the very numerous small discs generally oval in shape found thickly throughout the 
whole colony. The colour is lighter, being a very opaque cream colour. It must be emphasised, 
however, that our specimens differ markedly from Ashworth’s in that the stems are branched, 
while his were seldom branched ; but we do not feel justified in establishing a new species on this. 
The larger specimen with a total height of 2.7 cm. shows a short base, 1.7 cm. in 
maximum diameter, which divides practically at once into three main stems. These branch and 
branch again into the twigs, the conical summits of which bear the numerous polyps. Stem and 
branches are all firm and rigid, with a smooth surface. 
Previously recorded from New Britain and Loyalty Island (Pacific). 
7. Xenia crassa Schenk. 
For description see: SCHENK, Abh. Senckenb. naturf. Ges. Frankfurt, XXIII, 1896, p. 58, 1 fig. 
Stat. 34. Labuan Pandan, Lombok. 18 M. Coral reef. 16 Ex. 
Stat. 37. Sailus Ketjil, Paternoster Islands. 27 M. and less. Coral and coral sand. 2 Ex. 
Stat. 131. Karakelang Island. Reef. 1 Ex. 
Two colonies from Station 37, the smaller with much contracted and rather dried polyps. 
In the larger colony the low fleshy stem rises from a base, 3 X 1.2 cm., which has a 
membranous expansion over the piece of coral on which it has grown. It soon divides, at heights 
of about 7 mm., into several short thick polyp-bearing branches. As these are flabby and grow 
outwards rather than erectly, the whole colony has a very flattened appearance. The polyp- 
covered portion of the branches is strongly convex. The polyps are very numerous and closely 
packed together-, the maximum length in a much expanded one is 8 mm., with a flattened 
breadth of 2 mm. The short pinnules, blunt or slightly pointed, but never sharply pointed, are 
arranged in 3 rows on each side of the mid-line, which is left bare only in the lower portion 
of the tentacle. There are 10 — 18 pinnules in each row. 
The whole colony is very soft and flabby, though the minute spicules are very numerous. 
Colour of stem a deep cream, polyps and tentacles very light cream to white. 
The smaller colony with a maximum height of 2.2 cm. has a base 3.2 X I - 1 cm. in 
diameters and a polyp-bearing region 4.6 X l - 2 cm. 
A small colony from Karakelang, with a maximum basal diameter of 2.5 cm. and a 
similar height, shows the same strongly conical polyp-bearing summit, with polyps densely 
crowded, up to 5 mm. in length. The state of preservation did not allow of a count of the pinnules. 
Numerous small colonies, and one larger one with a diameter of 6.8 cm., from Station 34, 
Labuan Pandan. They all show the typical very convex polyp-bearing summits, closely crowded 
polyps, the arrangement of the pinnules in 3 rows on each side of the tentacle, about 13 — 17 
in each row. All are very soft and flabby and many show a basal membranous expansion which 
