1 99 
Although the specimens do not show any hint of being flabellate, still less of being 
reticulate, we refer them to the only described species, M. reticularis , which Nutting has also 
reported from the Siboga Expedition. 
The salient features are the following- : 
(1) the spicules are practically all spindles, of which three types may be distinguished: 
(a) a stout form, densely covered with compound warts; 
( 3 ) a more slender form, probably in many cases a younger stage, with numerous simple warts ; 
(c) a slender spindle, with attenuated spines; 
(2) the closely adjacent calyces are low domes with eight triangular projections which close over 
the mouth and shut in the retracted cylindrical polyps; 
(3) the axis is very delicate, black or golden brown in colour, and definitely calcareous. 
Previously recorded by Nutting from Station 28, Bali. 
Genus Elasmogorgia. 
1. Elasmogorgia filiformis Wright and Studer. 
For description see: WRIGHT and STUDER, Challenger Report on Alcyonarians, 1889, p. 133. 
NUTTING, Gorgonacea of the Siboga Expedition, Muriceidse, XHIb. 1910, p. 45. 
Stat. 213. Saleyer. Up to 36 M. Coral reefs, mud and mud with sand. 2 Ex. 
Two unbranched colonies of 23 and 24 cm. in length, with a diameter of 1.5 cm., unfor¬ 
tunately not well preserved. The spicules agree with previous descriptions. Those of the verrucae 
stand mainly in upright double rows. Beyond these are sloping double rows converging towards 
the bases of the tentacles. The axis is golden yellow. The colony bears a number of minute 
rosette-bodies which are loosely attached and look like larvae of some sort. 
Previously recorded by Nutting from Siboga Station 289, Timor Sea, and by Wright 
and Studer from Arafura Sea. 
2. Elasmogorgia filigella n. sp. (Plate III, Fig. i; Plate VII, Fig. 1; Plate XXV, Fig. 10). 
Stat. 80. 2 ° 25 / S., H7°43 / E. From 50—40 M. Fine coral sand. 1 Ex. 
A delicate unbranched colony, 13.2 cm. in length, of a coral red colour, with distant 
polyps all on one side. An average interval is 7 mm. The polyps project for 1 — 2 mm. The 
flexible horny axis is non-calcareous, of a yellowish colour. 
The bases of the polyps show a rather irregular arrangement of spindles, but this gives 
place to what can only be described as chevron. These are continued on to the bases of the 
infolded tentacles, which are creamy yellow at their tips. 
The spicules show practical uniformity, being tapering spindles thickly covered with low 
conical warts, mostly simple. Some of the smaller forms are smoother than the majority. The 
following measurements were taken: 1.1 X 0.08 mm.; 0.75 X 0.08 mm.; 0.2 X 0.02 mm. 
Note on Thesea, Pseudothesea and Acis. 
(1) Kukenthal in 1919 identified the genus Thesea of Duchassaing and Michelotti with the 
genus Acis, laying stress apparently on the fact that the coenenchyma of both is covered 
