CALKINS: SOME HYDROIDS FROM PUGET SOUND. 
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in the point that the oral tentacles are capitate in the latter and 
filiform in the former. This difference seems hardly sufficient for a 
family distinction, and I follow Schneider in placing the present 
species of Tubularia in the family Pennariidae which he character¬ 
izes as follows : Hydrocaulus branched or unbranched. Hydranths 
much enlarged proximally with one ring of large filiform tentacles 
about the base and with another set of capitate or filiform tentacles 
distributed irregularly or regularly. Proboscis conical, short, and 
not distinctly limited but passing gradually into the hydranth. 
Gonophores in the form of medusae or of sporophores. 
Tubulakia Linn. 
Hydrocaulus unbranched or slightly branched. Hydranths with 
the distal tentacles regularly or irregularly arranged. Gonophores 
medusae (Euphysidae) or sporophores springing from above the 
proximal tentacles (Schneider). 
1. Tubularia larynx Ellis and Solander. PI. 1, figs. 1, 1a. 
Stems clustered, simple or slightly branched, slender, pellucid* 
pale horn colored, ringed at pretty regular intervals; polypites- 
small, light red, with white tentacles; gonophores clustered on 
short peduncles, oval, of a purplish red color. (Hincks.) 
The Puget Sound form of this species is not constant in the 
above characters. The fourteen specimens are, with one or two- 
exceptions, perfectly simple, and even the exceptions are not so* 
fully branched as Hincks’s. The adjective “small” conveys no 
meaning whatever. The hydranths in the western forms measure- 
from 1 to 1.5 mm. in length and from 1.5 to 2.5 mm. in diameter 
at the basal region. Basal tentacles, in well-expanded individuals, 
measure about 2 mm. The stems are from 25 to 50 mm. in length 
and about 1 mm. in diameter, and taper slightly from the hydranth 
to the creeping stolon. In most cases the stems are irregularly 
annulated ; when branched there is a set of three or four rings 
above the point of branching; in other cases the annulations ex¬ 
tend from the stolon part way up the stem, a distance of 15 or 20 
mm., but become indistinct as they reach the upper portion. In 
still other cases there are no annulations at all. 
The gonophores “clustered on short peduncles” are from G to 8 
in number on each, and in 8 or 9 clusters. The larger gonophores 
