HYDROIDS OF THE WOODS HOLE REGION. 
345 
Gonosome. — Gonangia rather slender, not decidedly annulated, growing from the rootstock. The 
sexual products pass through part of their development in an acrocyst resting on top of gonangium. 
Distribution. — Found growing on stones, shells, seaweed, etc. A specimen in the U. J3. Fish 
Commission collection is labeled: “Off Nantucket Island. Depth, 23 fathoms.” 
Campanularia hincksii Alder. Fig. 25. 
(North, and Durh. Cat. in Trans. Tyneside Field Club, in, p. 127.) 
Trophosome. — Pedicels springing directly from a creeping rootstock, not extensively annulated. 
Hydrothecae large, deep, cylindrical, with about 12 prominent square-topped teeth, from between 
which vertical lines pass down over the surface of the hydrotheca. 
Gonosome. — Gonangia long, annulated, resembling those of Qlytia johnstoni ', but often not so deeply 
annulated. 
Distribution. — Growing on stones, shells, etc.., in rather deep water. A specimen was secured 
from a depth of 15 fathoms near Newport, R. I. Contrary to the rule among campanularians, the 
hydranth of this specimen was brilliantly colored, the general color being yellow and the basal part 
scarlet. 
A. 
25. Campanularia hincksii Alder. 
A.- Upper part of hydrotheca (enlarged). 
26. Campanularia volubilis (Linn.). 
A. Hydrotheca (enlarged). 
Campanularia volubilis (Linn.). Fig. 26. 
(Syst. Nat., p. 1311, under name of Scrtularia volubilis.) 
Trophosome. — Pedicels long, extensively annulated, springing from a creeping rootstock. Hydro- 
thecae small, tubular, with about 10 shallow rounded marginal teeth. 
Gonosome. — Gonagia borne on the rootstock, flask -shaped, with a long tubular neck and small 
terminal aperture. 
Distribution. — Found growing on Sertularella tricuspidata on specimens in the U. 8. Fish Commis- 
sion collection; supposed to be from rather deep water. 
The combination of tubular hydrothecae with very shallow teeth and extensively annulated 
pedicels will differentiate this form from others on the North Atlantic coast. 
Campanularia minuta, new species. Fig. 27. 
Trophosome. — Stem branching in an irregular straggling manner, attaining a height of about 
one-fourth inch. Pedicels long, extensively annulated, rising almost parallel with the main stem, 
which is itself extensively annulated, although there are smooth portions of considerable extent. 
Hydrothecae very small, deeply campanulate, with 8 to 10 very acute and prominent teeth. 
Gonosome— Not known. 
Distribution. — Parasitic on Obelia c.ommissuralis from the piles of the wharf at New Bedford. 
Collected by Mr. Yinal Edwards. 
This species appears to be quite distinct. It seems to be nearest to C. raridentata Alder, from 
which it differs in being branched, in the extent of annulations of the pedicels, and in the hydrothecae 
being considerably broader in proportion to their length. 
