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{ 6 ) the arrangement of the polyps, (c) the angle of origin of the polyps, [d) the nature of the 
supporting bundle, and (e) the angle at which the anthocodise arise from the stalk. 
On the other hand it differs in the following respects, (i) The stem and branches are 
far from being “very rigid”, (2) the arrangement in rows in the anthocodise is remarkably 
distinct, not indistinct as described by Kukenthal for 5 . ulei |, (3) the composition of the anthocodial 
rows is quite different. In .S', ulex the dorsal and laterals have 10 — 15 pairs, the ventrals 5 pairs. 
2. Stereonephthya diver gens n. sp. 
Stat. Not recorded. 1 Ex. 
A remarkably flexible yellowish colony, basally attached to a branching hydroid. It 
consists of two main stems 1 cm. and 3 cm. in length, arising from a common flat base. The 
diameter of the stalk is 2 mm. but broadens upwards. At the top of the stems short branches 
arise, bearing singly disposed polyps. Each polyp has a short stalk of about 1 mm. in length, 
the dorsal surface ensheathed by a strong supporting bundle which starts at the base with about 
eight spindles but tapers to two or even one. In the majority it does not project beyond the 
polyp, which is bent down on its stalk at a very acute angle. 
The anthocodial armature consists of eight points of 5 (sometimes 6 or 7) chevron pairs 
of spicules of almost equal size. In some of the polyps there is a pseudo-crown of one or two 
rows, but it must be noted that when such exists the number in the point is reduced, showing 
that these pseudo-crown spicules belong to the point and have come to be horizontally arranged 
because of the greater retraction of the polyp. 
Among the very thorny spicules there is a predominance of straight and curved spindles, 
but a few pseudo-clubs occur and a few irregular multiradiate forms. The prominences of the 
spicules vary from sharply conical to truncated. 
In the armature of the anthocodise and in the angle of polyp to stalk there is a 
suggestion of 5 . papyracea Kiik., but in that species the supporting bundle usually projects for 
i mm. Moreover the stalk of the colony is very short and shows a membrane-like expansion, 
from A. kukenthali Th. & MacK., where there is the same sharp angle of polyp to stalk, this 
new species is distinguishable at a glance, for 5 . kukenthali is a rigid bush-like colony, the 
supporting bundle is much more massive and projecting, and the anthocodial points are ill defined. 
3. Stereonephthya ilex n. sp. (Plate XXVII, Fig. 6). 
Stat. Not recorded. 2 Ex. 
Two small specimens of a very distinctive form marked by a predominance of short 
foliaceous branches, each suggestive of a holly leaf. The sterile stalk is very short. The largest 
specimen has a stalk of 1 cm. in length and a spreading polyparium of 2.5 cm. in height and 
a maximum breadth of 3 cm. 
The polyp stalk is in most cases long and slender, and may be as much as 2.5 mm. in 
length, while the tip of the supporting bundle sometimes projects as far again. The supporting 
bundle is strong and of the buttress type. It may show two or three long white spicules, but 
most commonly there is only one. Very striking is the ventral armature of the polyp stalk, 
