CALKINS: SOME IIYDROIDS FROM PUGET SOUND. 
363 
node, originating immediately below the joint, composed of longer 
and shorter internodes placed alternately, the former bearing the 
calycles ; hydrothecae small with an even rim, very distant, sepa¬ 
rated by two joints; the nematophores are elongate, two abreast 
behind and above the calycle, two in a line below it, one at the 
origin of the pinnae, and one on each segment of the stem. Gono- 
thecae borne on the axils of the pinnae (Hincks). 
I) intensions. Length of stem, 40-50 mm.; length of pinnae, 
2-3 mm.; distance between hydrothecae, .55 mm.; length of 
hydrothecae, .12 mm.; length of nematophores, .05 mm. 
Habitat. Point Wilson on stones, etc. Common. 
30. Flumularia echiilulata (variety). PI. 5, figs. 28, 28a, 
28b, 28c. 
The shoots are very delicate, the stem curved or straight; 
jointed, the internodes short and bulging in the center, bearing 
each a single branch. The branches are alternate, arching grace¬ 
fully upwards, with two joints immediately above the axil. Hydro¬ 
thecae small, basin-shaped, separated by a single joint. Nemato¬ 
phores very minute, simple, adnate to the side of the stem, one 
behind and above the calycle, one below it, and one or sometimes 
two (Hincks) in the axils of the branches. Gonothecae not present. 
Dimensions. Length of stem, 13 mm. ; length of branches, 
2 mm. 
I make this species a variety of P. echinulata because of the 
greater thickness of the branches and also because of the occasional 
presence of two joints between the hydrothecae. On no less than 
7 of the 28 branches of one specimen T find one interthecal space 
with two joints, although the usual number is one. In P. setacea 
two joints between cups is the rule, here it is the exception. 
Habitat. On algae and stones at Port Townsend. Uncommon. 
31. Aglaophenia struthionides (Murray) Clarke. Variety 
B. PI. 5, figs. 26, 26 a, 26b. 
Trophosome. The stems are clustered, simple, erect, divided by 
the oblique joints into short internodes of equal length, each 
bearing a single pinna; varying from light to dark horn color; 
the shoots tall, plumose. The pinnae are slightly curved towards 
each other, divided into internodes slightly larger than those of 
the stem, each internode bearing one hydrotheca. The hydrotheca 
is large and cup-shaped, expanding towards the distal end; the 
aperture is also large, with rim of 9 teeth more or less sharp. 
