CALKINS: SOME HYDROIDS FROM PUGET SOUND. 343 
Halecium Oken. 
The hydranths are very long, the lower part of the body being 
spindle-shaped, while the tentacle region of the body is strongly 
marked off, proboscis conical. 
4. Halecium wilsoni sp. nov. PI. 1, figs. 4, 4a, 4n. 
Troph osome. Hydrocaulns erect, polysiphonic (stem and main 
branches), delicate, irregularly and slightly branched. Branches 
divided by more or less oblique joints into internodes 150 mm. long, 
each internode giving rise to one branch which is similarly divided 
into internodes, each one of which gives rise to one hydrotheca. 
In some cases there is an axillary branch which is always more or 
less annulated; each internode has a single annnlation immediately 
above the joint. Hydrothecae more or less tubular with slightly 
everted margin. 
Gonosome. Gonophore (male) . Large circular discs with pecu¬ 
liar and decidedly characteristic blastostyle. Orifice at extremity 
directly in the center or very slightly to one side. Often placed on 
comparatively long stems having one, or occasionally two, distinct 
annulations. Irregularly placed on the colony stalk. Color of 
gonophores light red running into salmon. Color of trophosome 
very light horn. Similar in many respects to Alder’s II. labrosum 
but smaller, more delicate, and quite different from the latter in 
shape and position of the gonosomes. 
Dimensions. Height of colony, 50 mm.; diameter of main stem, 
.5 mm.; length of internodes, .15 mm.; length of male gonophore, 
1.-7 mm.; diameter of gonophore, 1.5 mm. 
Habitat. Found at Bremerton in June on piles and floats. 
5. Halecium densum sp. nov. PI. 1, figs. 5, 5a, 5b, 5c. 
Trophosome. Hydrocaulns erect, shrubby, 20-40 mm. in height, 
densely and irregularly branched, deep brown in color. Branches 
often, but not invariably, arising from shonlder-like processes, some¬ 
times as many as three coming from a common point, and each with 
a single constriction or annnlation just above the point of origin. 
Branches divided by constrictions into internodes of unequal length, 
usually one lateral branch to an internode, but sometimes with 
none at all. Hydrothecae tubular with much everted rims, placed 
irregularly, but with a tendency towards sub-alternate positions, and 
as a rule situated immediately below the joint. Gonosome not 
known. 
