1912-13.] Hydroids of British Antarctic Expedition, 1908. 23 
cylindrical portion which tapers upwards into a neck terminated by a 
small aperture. They vary much in size and shape — especially as regards 
the length and development of the terminal neck, which is frequently 
almost obsolete. Faint undulations in the outline were rarely observable 
on the distal half, and a few abnormal specimens exhibited a strong median 
constriction, calling to mind similar abnormalities noticed in the gonangia 
of Thuiaria tenera from the Firth of Clyde (Ritchie, 1911, p. 219, fig. 4). 
The gonangia stand erect, supported on moderately long pedicels, which 
bear strongly marked twists, usually about six, but varying from five to 
ten in number. 
The soft parts, both of trophosome and of gonosome, were unfit for 
examination. 
Dimensions . — 
Stolon, diameter 
Hydrotheca, height . 
diameter at mouth 
Hydrocaulus, length 
diameter 
Gonangium, length . 
o 7 o 
greatest diameter 
length of pedicel . 
0T3-0T5 mm. 
0- 86-0-93 mm. 
0‘40-0"50 mm. 
2-0-3-6 mm. 
0‘065-0T05 mm, 
1 - 8-2*5 mm. 
0‘68-0'74 mm. 
0*45-0’50 mm. 
Localities. — Bay (east of Cape Royds), 7-8 fathoms, and 7-20 fathoms, 
June 1908, growing on Campanularia lobata, rare. Cape Royds (south), 
20-30 fathoms, August 1908. 
Distribution. — Campanularia volubilis has been recorded as a boreal 
species, widely distributed within the Arctic Circle and in the North 
Atlantic, and occurring also in the North Pacific, on the west coast of 
North America. It has not hitherto been found in the southern hemi- 
sphere. 
Remarks. — These specimens differ from typical Campanularia 
volubilis in their large size, in possessing almost smooth hydrocauli, in the 
length of the stalk of the gonangium, and in the shortness and poor 
development of the terminal neck of the gonangium itself. The trophosome 
resembles that of Campanularia tincta , but the gonangia of the two 
species are different. 
It is interesting to note that large typical specimens of this species have 
been described by Marktanner-Turneretscher from within the Arctic Circle 
— Bastian Island, in the neighbourhood of East Spitsbergen (Marktanner- 
Turneretscher, 1895, p. 406). 
