350 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
9. Campanularia attenuata sp. nov. PI. 2, figs. 9, 9a, 9b, 
9c. PI. 6, fig. 9 d. 
Trophosome. Stems fiexuons, very long, branched, given off at 
short intervals from a creeping stolon, 10-16 rings at base and 
above point of branching. The parent stem is not ringed above 
the branches. With from 2-7 or 8 well-marked rings below liydro- 
theca, but often reduced in diameter as it approaches the base of 
the hydrotheca. The branches are given off at long intervals and 
are bent directly upwards, parallel with the parent stem. The 
hydrothecae are large with 9 or 10 rounded teeth on the margin 
and have a slight taper from margin to base. 
Gonosome. Gonotheca large, borne on short, ringed stalk on 
the parent stem just above the axils of the branches ; smooth, oval, 
and with a terminal aperture. The blastostyle as a rule bears three 
medusae, the oldest of which are provided with a well-marked manu¬ 
brium and four tentacles. The diaphragm is a simple partition 
with down-turned edge at the aperture. The hydrantli is limited 
by an annular ridge which, however, is not so pronounced as in the 
preceding species, being more of a swelling. Coenosarc very much 
attenuated in basal chamber, becoming gradually thicker as it 
approaches the stem. The basal chamber is a part of the stem. 
T) intensions. Height of trophosome, -H9 mm.; length of stem 
to primary branches (variable) from 3.5-7 mm.; length of hydro¬ 
theca, .5 mm.; width of hydrotheca margin, .25 mm.; length of 
gonotheca, 1.3 mm. ; width of gonotheca at apex, .45 mm.; width 
of gonotheca at base, .15 mm.; number of tentacles on hydranth, 
16." 
N 
In some respects this species is similar to C. inconspicua , possess¬ 
ing more teeth, however, and having a different mode of growth. 
The parallel course of the branches and stem and their great length 
give the species a characteristic appearance, although it agrees with 
C. inconspicua in the size and shape of the gonosomes and in the 
structure of the diaphragm. 
Habitat. On red algae at Port Townsend, Scow Bay. Like the 
preceding species, the stems, branches, gonothecae, and hydrothecae 
are covered with a small diatom belonging to the genus Cocconeis. 
10. Campanularia (G-onothyraea) gracilis Sars. PI. 2, 
figs. 10 a, 10 b, 10. c. PI. 6, fig. 10 n. 
Lao media gracilis Sars. Gonothgraea gracilis Allman. 
Trophosome. Stems flexuous, rather long, much and irregularly 
