JOURNAL 
OF THE 
ROYAL MICROSCOPICAL SOCIETY. 
MAY, 1878. 
I . — On a New Coral, Stijlaster stellulatus ; and Note on 
Tubijpora musica. 
By Charles Stewart, F.L.S., Hon. Sec. E.M.S. 
{Read hefore the Royal Microscopical Society, March 6, 1878.) 
Plate III. 
The interesting papers by Mr. H. N. Moseley on the Milleporidse 
and Stylasteridae,* confirming the view long held by many natu- 
ralists, that the former really belong to the Hydrozoa, and showing 
that the latter (Stylasteridae) should be referred to the same class, 
have given special interest to a group of corals long remarkable 
for the beautiful permanent colour which most of them present. 
As a probably new species of Stylaster has recently come under 
my notice, I have thought that a few remarks on it might be of 
interest to this Society. 
I am indebted for the specimen to the kindness of Mr. H. P. 
Potter, who accompanied Mr. Brassey in his recent voyage round 
the world. It was given to him at Tahiti, with the statement that 
it was extremely rare, and only found at one small island in the 
neighbourhood. 
The corallum is of a bright rose colour, especially in the 
younger branches, the older parts being often more pale. The 
DESCRIPTION OF PLATE III. 
Fig. 1. — Lateral branch of 8. stellulatus, showing crowded calicles, some under- 
going division, x 25 diam. 
„ 2. — Fragment of branch, showing ampulla}. X 25 diam. 
„ 3. — Orifice of calicle. x 40 diam. 
„ 4. — Vertical section of calicle, showing canals and style. X 40 diam. 
„ 5. — Fragment of Tvbipora musica, the thecae have been opened in places to 
show included tube, x 3 diam. 
„ 6. — Fragment of tube, x 83 diam. 
* ‘Proceedings of the Royal Society,’ vol. xxv. p. 9.3. 
VOL. I. 
E 
