20 
THE VOYAGE OF H.M.S. CHALLENGER. 
No trace of gonosome was present in any of the specimens of Campanularia insignis, 
and our ignorance of this part of the colony gives a purely provisional value to our 
generic allocation of the species. 
Campanularia tulipifera, n. sp. (PI. X. figs. 1 , la, lb). 
Trophosome. — Hydrocaulus attaining a height of about one inch, monosiphonic, 
sparingly branched. Hydrothecse supported on peduncles which spring from the sides 
of the branches with, for the most part, a pinnate and alternate disposition, large, deep, 
slightly narrowed behind the orifice, and again widening towards the base ; margin with 
wide and shallow crenations, walls with very regular longitudinal plicae which extend 
from the orifice to the base, and correspond in number with the marginal crenations. 
Gonosome not known. 
Locality . — Station 150, off Heard Island; lat. 52° 4' S., long. 71° 22' E.; depth, 
150 fathoms. 
Campanularia tulipifera is a beautiful little Hydroid, remarkable for the large size 
and graceful form of its hydrothecse. These are three -twentieths of an inch long, and 
nearly one-twentieth of an inch wide at a point a little above the base. The margin 
of the orifice is slightly everted, and is indented with eight shallow crenations, from each 
of which a narrow longitudinal fold of the delicate, perfectly transparent walls passes 
backwards to the base, thus giving to the hydrothecse an aspect of extreme elegance which 
bears a resemblance not very remote to that of the flower of a tulip. The peduncles 
vary in height but have usually about half that of the hydrothecse, and are for the most 
part provided with a distinct joint which is situated near the middle point of their length. 
The stem though thick is monosiphonic and springs from a creeping tubular filament. 
The walls of the hydrothecse are extremely thin and absolutely transparent, and the 
plicse with which they are ornamented are most obvious when the specimen has been 
just removed from the preserving liquid, and before it is allowed to become dry. 
Campanularia ptychocyatlius, n. sp. (PI. X. figs. 2, 2a). 
Trophosome. — Hydrocaulus a creeping stolon sending off at short intervals the 
peduncles of the hydrothecse. Hydrothecse obconical, deep, with the margin deeply 
dentate and with the walls for some distance below the orifice very thin and collapsible ; 
peduncles long, annulated at intervals. 
Gonosome. — Gonangia borne by the creeping stolon, destitute of annulation, deep, 
cylindrical, but narrowing towards the base where they are supported on a short annu- 
lated peduncle, and with a constriction just below the wide truncated summit ; orifice 
wide, circular, occupying the summit of the gonangium. 
Locality . — Bahia. 
