Vow. 2] Torrey.—Hydroids of the San Diego Region. 13 
theeae less than half as broad as long (.5x.22 mm.; .6x.25 mm.), with 
11 or 12 short, sharp marginal teeth. Hydranth with 22 to 24 tentacles. 
Gonosome absent, July 13, 1903. 
ee a 
Fig. 4.—Campanularia hesperia. Hydrotheca and pedicel. 
Distribution. la Jolla, Cal., between tides, on the tests of 
ascidians. 
This species closely resembles Clytia cylindrica Ag. in habit 
and skeletal features, but the latter species has but 16 tentacles, 
and the absence of the gonosome makes it desirable to distinguish 
between the two for the present. 
15. Campanularia hincksi Alder. 
Campanularia Hinks, Alder, 1857, p. 127. 
Campanularia Hinksii, Hincks, 1868, p. 162, pl. 24, fig. 3. 
Campanularia hinksi, Torrey, 1902, p. 53. 
Trophosome. Pedicels arise directly from hydrorhiza. Hydrothecae 
large and deep, with 11 to 14 flat-topped teeth which may have rounded 
corners or be slightly hollowed out above. Wall very thin, with delicate 
longitudinal lines from the margin between the teeth. 
Gonosome. Gonangia much elongated, slightly tapering distalward, 
to truncate end; 10 to 18 wavy annulations. 
Distribution. Mouth of San Diego Bay, in 3 fathoms; off 
San Diego in 40 to 75 fathoms. Newport, R. I. (Nutting). Brit- 
ish coasts, from 10 to 20 fathoms to deep water (Hincks). 
Gonosome present, June 29, 1903. 
16. Campanularia volubilis (Linn.). 
Sertularia volubilis, Linnaeus, 1767, p. 1311. 
Campanularia volubilis, Alder, 1856, p. 358, pl. 13, fig. 7. 
Campanularia volubilis, Hartlaub, 1901, p. 357. 
Campanularia volubilis, Torrey, 1902, p. 54, pl. 5, fig. 48. 
Trophosome. Pedicels long, annulated, springing from hydrorhiza. 
Hydrothecae small, broadly tubular; margin with 9 to 10 short blunt teeth, 
frequently reduplicated. 
Gonosome. Gonangia smooth, flask-shaped, somewhat compressed, 
with a long narrow neck and small circular aperture. 
Distribution. San Diego, shore rocks; San Pedro, Cal., 9 
fathoms; Tomales Bay, Cal., shore rocks. Near Vancouver, B. C. 
(Hartlaub). Gulf of St. Lawrence (Packard). Massachusetts 
