Hapvpon—Branched Worm-tubes and Acrozoanthus. 345 
states that the worm to some extent modifies the growth of the 
coral, the coral growing round the worm-tube which thus becomes 
embodied in the ceenenchyme. Although Miss Buchanan describes 
the tubes as having a “ parchment-like consistency, with jagged 
lateral openings,’’ she does not allude to the branched character of 
the tube, nor does this appear in her plate x1. I have therefore 
thought it advisable to draw attention to this character, and to 
figure a specimen (p. 334) which exhibits it in a fairly satisfactory 
manner. 
I have indicated by numbers all the orifices in the tube, and 
there were probably several others, as the specimen figured is only 
a fragment. Immediately after the side branch at 2,the tube 
divides into two main branches, the one has two orifices, the other 
has four, three of which are close together, and diverge something 
like the crown tines of a deer’s antler. 
In the Zoological Department of the Royal College of Science, 
there is a somewhat similar worm-tube associated with Oculina 
virginea ; but the commensal worm is unknown, and the locality 
of the specimen is unrecorded. In this specimen there are six 
lateral openings, most of which are at the extremities of short 
branches, and there are indications of two other orifices which have 
been covered by the coenenchyme of the coral. 
Professor E. Ehlers,1in his Report on the Annelida collected 
on the “‘ Blake”? Expeditions, describes the branched tubes of the 
following Polychetes :—Hunice floridiana, E. tibiana, and LE. con- 
glomerans. ‘The first species has lamellose papyraceous tubes, 
often variously contorted with lateral ragged openings irregularly 
placed, though, in general, alternate. In Z. tibiana the sub-pellucid 
horny tube is either cylindrical and straight, or regularly serpen- 
tine; at every bend there is a tubulated aperture directed back- 
wards, with an expanded fimbriated border.” Lastly, the whitish 
paper-like tube of H. conglomerans has only a single orifice, one 
end is closed, and there are several spots and prominences 
which also appear to have been once open, and subsequently closed 
over. 
1 <P orida—Anneliden.’? Mem. Mus. Comp. Zool., Harvard, xv., 1887. 
2 The description of this and the preceding tube have been compounded from Ehlers’ 
and from L. F. de Pourtales’ ‘‘ Contributions to the Fauna of the Gulf Stream at 
Great Depths.’’ Bull. Mus. Comp. Zool. Harvard, No. 6, 1867, p. 108. 
SCIEN. PROC. R.D.S. VOL. VIII., PART 1V. 2C 
