ALCYONARIA. 13 
The tentacles of the autozooids have some twelve or thirteen pinne on each side 
(fig. 7). These pinnz are not always situated opposite to one another nor regularly 
alternate. The pinne of one side seem to be developed independently of those on the 
opposite side. The size of the pinnz varies in a manner that suggests that new pinnie 
are interpolated between the old ones ; but they rarely exceed a total length of 4 mm. 
There are numerous siphonozooids. The most conspicuous of these are arranged 
in petaloid areas on the under, 7.e., proximal side of the rosette (fig. 2). The apex of 
seven of these petaloid area ends at the fork between two autozooids, but the apex of 
one area (fig. 2, V,) extends between the two autozooids to reach the distal side, where it 
terminates at the base of the ninth autozooid. This area is, according to Dr. Jungersen 
(p. 82), the ventral area. At the apex of the dorsal petaloid area, 7.e., the one imme- 
diately opposite to this, there is a single siphonozooid distinguished by its greater 
size (fig. 2, D.). 
The siphonozooids of these areas are about 0°3 mm. in diameter and_ project 
slightly as small conical warts or papilla above the coenenchym. There can be no 
doubt that they are to a certain extent contracted, as the mouth area is very con- 
stricted. From the apex of the cone of many there projects a single long (0°6 mm.) 
simple digitiform tentacle (fig. 4). I have little doubt that each siphonozooid has such 
a tentacle, but it is broken off or completely retracted in many. 
In addition to these, there are many other siphonozooids distributed on the stalk 
and bulb. They are very inconspicuous when the surface of the spirit specimen is 
examined, but they can be recognised as minute slit-like depressions, arranged in 
longitudinal rows, when a simple magnifying glass is used. I cut tangential sections 
through a small piece of the upper part of the bulb and found that these siphonozooids 
have a diameter of about 0'14 mm. (fig. 6.) The stomodaeum is long, penetrating 
right through the thick cortex of the bulb, is oval in section, the longer diameter being 
about 0°1 mm., and it has a well marked siphonoglyph (57). The specimen is not 
sufficiently well preserved to enable me to state definitely that the dorsal mesenteric 
filaments are present, but certain groups of darkly stained cells situated below the 
stomodaeum probably represent these structures. These siphonozooids do not possess 
a tentacle. 
It was at this point in my investigation that a fire broke out in my laboratory 
and entirely destroyed the specimen. I am, therefore, unable to give any further 
description of the distribution of these siphonozooids. There is no doubt that they 
occur all along the thin part of the stalk and on the upper end of the bulb. I believe 
they occur also on the lower part of the bulb, but I made no sections to confirm the 
external features. It is not possible to make any definite statement concerning the 
presence or absence of calcareous spicules in the bulb. There are no calcareous bodies 
in the upper part of the bulb, nor are there any in the autozooids or siphonozooids of 
the rosette. In the one small piece of the dermis of the lower part of the bulb I could 
find none, but it is just possible that a further search might have revealed them. 
