186 
The genus Paralcyonium agrees with the genus Studeriotes in having a basal involucre 
portion into which the upper polyp-bearing region can be retracted. It differs from it, however, 
in the delicacy and transparency of the polyparium, in the less substantial character of the 
involucre, in the much weaker armature of the polyps, in the much smoother less warty type 
of spicule, and in the mode of branching of the polyparium (see Thomson and Simpson, Alcyo- 
narians of the Indian Ocean, 1909, p. 12). 
Previously recorded from Algiers, and Gulf of Naples. 
Genus Studeriotes. 
1. Studeriotes crassa Kiikenthal. 
For description see: KUKENTHAL, Fauna Siidwest-Australiens, Band III, 1910, p. 73, 3 figs. 
Stat. 80. 2°25'S., H7°43 / E. 50—40 M. Fine coral sand. 1 Ex. 
Stat. 240. Banda. 9 to 45 M. Black sand. Coral. Lithothamnion-bank in 18—36 M. 3 Ex. 
Stat. 258. Tual, Kei Islands. 22 M. Lithothamnion, sand and coral. 15 Ex. 
Numerous grey-brown colonies from Station 258 are clearly referable to this species. A 
typical specimen has a height of 7 cm., of which 2.8 is the flattened stalk portion. The maximum 
diameters of the stalk are 2.2 cm. and 1.3 cm. The branches vary considerably in length and 
in state of contraction, the longest up to 2 cm. 
The specimens are at once markedly separated from S. mirabilis by the massive cup¬ 
like involucre of the latter, and from S. longiramosa by the weaker supporting bundle and more 
flaccid character of the branches in the latter. They are nearer to S. semperi , but may be 
distinguished by the following among other features : 
(a) the polyps are practically without spicules ventrally; 
P) there are no transversals in the polyp; 
( c ) the supporting bundle generally projects beyond the polyp; 
id) transversely disposed spindles are present in the branch cortex. 
Two brown colonies and several fragments from Station 240 and a fragment from 
Station 80 show the usual features. 
Previously .recorded from West Australia. 
2. Shideriotes longiramosa Kiikenthal. (Plate XIII, Figs. 6 and 8). 
For description see: KUKENTHAL, Fauna Siidwest-Australiens, etc. Band III, Lief. 1., 1910, 
p. 71, 1 fig. 
Stat. 240, Banda. 9 to 43 M. Black sand. Coral. Lithothamnion bank in 18—36 M. 6 Ex. 
A fine specimen of this interesting species from Station 240. The firm stalk portion rises 
to a height of 3 cm., bears a projecting shelf at the top, and then gives rise to numerous delicate 
branches, much relaxed. The tip of the colony is 8 cm. above the shelf, and an individual branch 
may be 3 cm. long. The branches bear numerous polyps about 1.5 cm. in height, sometimes in 
approximate whorls. They are upturned and bent inwards. The supporting bundle shows a longish 
spindle flanked by two or three smaller ones on each side. It is but a slight supporting bundle 
compared with what is usual in Dendronephthya. The whole colony resembles the figure by May 
