Dr. J. E. Gray on a new Japanese Coral. 263 
reduced to a ring of bristles, and the stigma is also small; 
but by the remarkable arrangements above noticed in the hard 
and completely syngenesious anthers (syngenesious from an 
early stage in the bud) and in the style, the pollen is ejected 
in small quantities at a time on the exact spot in the insect on 
which it should be placed for transportation to the stigma of 
another flower, and is swept with equal precision from that 
spot by the stigma of the next flower he visits. 
XX XI.—WNote on a new Japanese Coral (Isis Gregorii), and 
on Hyalonema. By Dr. J. E. Gray, F.R.S. &e. 
Mr. BrapLey GreGory, the Surgeon of H.M.S. ‘ Rattler,’ has 
sent to Mr. Carruthers, for the British Museum, a fragment of 
a coral which appears to be new to science. Mr. Gregory ob- 
serves :—‘‘ The man who was sent to procure specimens of the 
Hyalonema from Inosima brought back in addition a large 
branch of what at first appeared like the plant that grows in 
the marshes, called Hquisetum; but on close inspection it was 
found solid and smooth like glass, with joits and secondary 
branches coming from it. The gentleman who was kind 
enough to show me this thing tore off a small branch, which I 
have sent to you lashed on to a piece of bamboo.” 
The specimen sent indicates a new species of [sidinw. The 
branch is very long, slender, of nearly equal thickness almost 
throughout the whole of its length, only very slightly and 
gradually tapering just at the tip. It is formed of about fifty 
or fifty-one elongated slender joints united by a short but 
distinct pale brown articulation. The joints are very similar 
in length, being rather more than half an inch long ; but some- 
times there is a shorter one interjected in various parts of the 
series. The branch is about 27 inches long, and $ inch in 
diameter ; the horny internodes are very much shorter than the 
joint, and about the same diameter. 
Unfortunately the specimen does not show what was the 
general distribution of the branches. This may be verticillate, 
as Mr. Gregory compares the coral to an Hquisetum; and 
the elongated branches are like the slender ones of some 
of the species of that genus. The specimen does not afford 
any means of determining if the branches arise from the cal- 
careous joints, or from the horny internodes of the stem, which 
distinguishes the two genera Js?s and Mopsea. 
Waiting the receipt of more perfect specimens, I propose to 
call the coral, provisionally, Is’s Gregor?/, after the gentleman 
who so liberally sent it to the British Museum. 
