24 SYDNEY J. HICKSON anp F. H. GRAVELY. 
hydrocauli were found in the bottle. These may have formed part of the colonies 
attached to the worm tube, and therefore our estimate of 170 mm. for the height of 
the colony may be considerably less than it should he. 
The colonies branch irregularly and rather sparingly, and the hydrocauli are 
polysiphonie to their distal extremities. At these extremities there appear to be four 
to six parallel but anastomosing tubes, each of which bears a single hydranth at 
regular intervals, and as the hydranths of the tubes arise at the same level, they 
form a series of verticels round the hydrocaulus. 
In tracing these tubes down towards the hydrorhiza other tubes appear, which 
creep over the primary tubes in an irregular manner and bear hydranths at less 
regular intervals. In the lower parts of the stem (fig. 25) the secondary tubes are 
more numerous, and play an important part im building up the substance of the 
thick base. 
In some eases stolons in place of hydranths occur in the verticels of the primary 
stems. These may perhaps give rise to the secondary branches. Single tubes bearing 
hydranths and gonophores also occur climbing over polyzoa epizoic on the main 
hydrocaulus. 
The bell-shaped hydrothece are 0°6 mm. in length and 0°4 mm. in diameter 
at the mouth. The pedicel of the hydranth is about 1°5 mm. in length, marked 
throughout its whole length by a spiral groove. The hydranths have 28-34 tentacles, 
arranged in a double row, and each about 0°3 mm. in length. The gonothece are 
at first 0°8 x 2°5 mm. in size and pear-shaped, but later, when fertilisation has 
been effected, become flask-shaped and 0°6 x 3°0 mm. in size. They are supported 
by short spirally marked pedicels. 
The specimens differ from the type specimens of the species in the greater size 
of the hydrocauli, hydranths and gonophores, in the greater regularity of and greater 
intervals between the verticels of the hydranths, i the well-defined spiral marking 
of the pedicels, and in the extreme tenuity of the edges of the hydrothece, which 
renders it impossible to determine with certainty whether the margin is or is not 
dentate, as it is in the type. 
Although Campanularia verticillata is a common species in European waters, it 
is not included in Hartlaub’s list of Southern species (10: pp. 505-509). 
CAMPANULARIA EVERTA. 
Campanularia everta, Clark, Trans. Conn, Acad., III. (1876), p. 253. 
Campanularia everta, H. B. Torrey, Univ. California Public., Vol. I. (1902), pp. 51, 52, pl. iv., figs. 35-37. 
Localities. —W.Q., McMurdo Bay, February 20th and 28th, 1902; 20 fms. W.Q., 
Duct, July 15th, 1902. 
This species has been previously described from the Pacific coast of N. America. 
According to Mr. Torrey it is extremely variable (24: pp. 51-52). 
