12 University of California Publications. [ ZooLoGy 
Distribution. Mouth of San Diego Bay, in 3 fathoms. Woods 
Hole, Mass., between tides (Nutting). 
There is much variation in the size and proportions of the 
hydrotheeae, correlated apparently with mode of growth. The 
stems are usually densely clustered. Some of the larger stems, 
however, grow more freely above the rest. These longer stems 
bear the longest hydrothecae, which may be .92 mm. long. On 
the crowded stems, the hydrothecae may be no longer than .60 
mm. Short seattered stems produce the largest hydrothecae of 
all. The diameter does not vary with the length, as the following 
Measurements in mm. show: .625x.26; .67x.31; .68x.45; 
10x .45; .72x39; .92x.45. As a rule, however, the diameter 
is less than half the length. The theeae growing in the clusters 
are relatively broader. 
The gonosome was not present, July 15, 1903. 
13. Campanularia everta Clark. 
Campanularia everta, Clark, 1876a, p. 253, pl. 39, fig. 4. 
Campanularia everta, Torrey, 1902, p. 51, pl. 4, figs. 35-37. 
Trophosome. Pedicels of variable length, smooth, wavy or irregu- 
larly annulated, arising directly from a creeping hydrorhiza;_ spherical 
annula immediately below each hydrotheca. Wall of latter varies greatly, 
from excessive thickness to thin; straight or convex in profile; margin 
usually crenate. 
Gonosome. Gonangia somewhat compressed, ovate, with small round 
terminal aperture. Acrocysts may be present in female, which are some- 
what larger than male. 
Distribution. San Diego, low water to 24 fathoms; Catalina 
I., 42 fathoms; Pacific Grove, Cal. San Diego (Clark). 
Gonosome present, June 26, 1903. 
Transitions between all the forms of hydrothecae have been 
traced in the same colony. C. everta can be distinguished from 
Clytia compressa by the gonosome; the gonangia have a much 
narrower aperture and the gonophores are fixed sporosacs. 
14. Campanularia hesperia, n. sp. 
Trophosome. Stems simple, unbranched, from a creeping hydrorhiza, 
terminating in hydranths; with about 10 rings at base, 2 to 4 just below 
hydrothecae, and usually 3 or 4 others in the distal half of the stem. Hydro- 
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