28 
THE VOYAGE OF H.M.S. CHALLENGER. 
slightly swollen, and carrying the hydrotheca through the medium of a small globular 
segment. Hydrothecse hemispherical with oblique margin. 
Gonosome. — Gonangia elongate ovate, with slightly expanded and truncated summit, 
smooth, supported on very short but definite peduncles which spring from the creeping 
stolon in the intervals of the hydrothecal peduncles never clustered. 
Locality . — Station 315, Port William, Falkland Islands; lat. 51° 40' S., long. 
57° 50' W,; depth, 5 to 12 fathoms. 
The present species is very distinct from both Hypanthea repens and Hypanthea 
aggregata. It is a much smaller form than either of these, while the hydrothecse are 
much shorter and relatively wider than those of either of the Kerguelen species. The 
gonangia, moreover, instead of being fusiform as in these, widen at the summit, and 
instead of forming dense groups as in Hypanthea aggregata, are distributed along with 
the hydrothecse singly over the length of the stolon. Where the gonangia are present 
there is usually one between every two hydrothecse. 
Hypanthea hemispherica, like the other two described species, spreads over the 
fronds of a Laminaria-like seaweed. While both the former are inhabitants of the 
seas off Kerguelen Island, the present species was dredged off the Falkland Islands. 
Though the two localities agree pretty closely in latitude they differ widely in longitude, 
and the fact of so remarkable a genus being represented — though by different species — 
in both, points to an interesting parallelism between the faunae of the two regions. A 
still further feature of parallelism is seen in the occurrence of Obelia geniculata both in 
the region of Kerguelen and in that of the Falkland Islands. 
Calamphora, n. gen. 
Name from kcAos, beautiful, and d/*<£opets, a pitcher, in allusion to the form of the hydrothecse. 
Generic Character. Trophosome. — Hydrocaulus a creeping stolon. Hydrothecae 
lageniform, inoperculate, almost sessile on the stolon. 
Gonosome. — Gonangia oviform, subsessile on the stolon. 
The genus Calamphora differs from all the other Campanularians in the form of its 
hydrothecae, which are neither campanulate as in Campanularia and its more immediate 
allies, nor tubiform as in Callicella, Lafoea, &c. They are on the contrary wide and 
ventricose towards the middle and contracted at both distal and proximal ends. 
The hydrotheca is provided at its proximal end with a diaphragm or floor perforated 
for the transmission of the ccenosarc which is to become developed into a hydranth in 
the cavity of the hydrotheca. In this respect the present genus agrees with Campanu- 
laria but differs from most of the species in which the hydrotheca departs from the 
campanulate type of form, for in these the cavity of the hydrotheca is directly continuous 
with that of th e peduncle or with that of the common stem. 
