HYDROIDS OF THE WOODS HOLE REGION. 
347 
Campanularia verticillata (Linn.). Fig. 30. 
( Sertularia verticillata Linn., Syst. Nat., p. 1310.) 
Trophosome. — Colony branched, attaining a height of about 5 inches. Stem and branches fascicled, 
composed of many parallel tubes from which the pedicels arise in a verticillate manner. Hydrothecae 
large, rather broadly campanulate, with about 12 deeply cut acuminate teeth. 
Gonosome. — Gonangia borne on the main stem and branches, oblong flask-shaped, with necks 
often produced into tubular extensions with terminal openings. 
Distribution. — Found in rather deep water attached to stones, shells, etc. Block Island Sound, 17 
to 45 fathoms. Fisher Island Sound, 4 to 11 fathoms. 
( Veri-ill.) 
Campanularia amphora (Ag. ). Fig. 31. 
( Laomcdea amphora Ag., Cent. Nat. Hist. U. S., iv, p. 311.) 
Trophosome. — Colony attaining a height of 6 to 
7 inches, branching in a subverticillate manner, the 
branches inclined upward more than in Obelia commis- 
suralis, which it greatly resembles. “But the most 
marked difference is in the middle of each internode, 
where it bulges laterally and directly in line with the 
point of insertion of the branch or pedicel below it.” 
(L. Agassiz) . Pedicels annulated. Hydrothecre deeply 
campanulate, very gracefully formed, aperture entire, 
margin slightly everted. Hydranth with about 30 
tentacles. 
Gonosome. — Female gonangia elongate oval, about 
four times as long as the hydrotheca, somewhat truncate 
at top, and with a very small aperture. Male gonangia 
more slender, with a slightly produced neck. 
Distribution. — Common in shallow water in the 
Woods Hole region. This species is apt to be mistaken for Obelia eommissuralis when the gonosome 
is absent. 
Campanularia angulata Hincks. Fig. 32. 
(Annals and Magazine of Nat. Hist., 3d series, viit, p. 261.) 
Trophosome. — Colony slightly branched, attaining a height of about three-fourths inch. Stem 
geniculate, with long internodes, annulated above the origin of each pedicel. Pedicels long, usually 
