Ifraser] HYDROIDS OF THE VANCOUVER ISLAM) REGION 181 



Distribution.— Albatross Station 3464, N. 48° 14', W. 123° 20'4U" 

 (Nutting). 



I have not found this species in this region. The description 

 and figures are from an Alaskan specimen. 



Abietinaria gracilis Nutting 



PI. XXVI, Fig. 95 



Abietinaria gracilis Nutting, American Hydroids, pt. 2, 1904, p. 120. 

 Abietinaria gracilis Fraser, West Coast Hydroids, 1911, p. 61. 



Trophosome. — Stem straggling, the portion that is branched 

 somewhat geniculate; branching pinnate, not regular, branches vary- 

 ing in length so that the outline of the colony is irregular; hydrothecse 

 alternate or nearly opposite, distant, basal portion enlarged, narrowing 

 gradually to a slender neck which expands to form (he margin, this 

 turned upward so as to be transverse to the axis of the branch. The 

 whole hydrotheca is longer and more slender than others of this type. 



Gonosome. — Gonangia borne on rows on upper side of branches, 

 oval, narrowing above to form a short neck and below to form a short 

 pedicel; longitudinal crests present, distinct but nol very much raised. 



Distribution.— Albatross Station 2873, N. 48° 30', W. 124° 57', 40 

 fathoms (Nutting); north of Gabriola I., Northumberland Channel. 



Abietinaria greenei (Murray) 



PI. XXVI, Fig. 96 



Scrtularia greenei Murray, Ann. and Mag. N.H., 3d ser., 5, 1860, 



p. 121. 

 Abietinaria greenei Fraser, West Coast Hydroids, 1911 , p. 61 . 



Trophosome. — -Colony consisting of a dense cluster ol slender, 

 erect stems, which branch irregularly, the branches running in the 

 same general direction as the stem and these as well as the main stem 

 often branching dichotomously ; the angle between the branch and the 

 stem, even when the branching is dichotomous, is small and there is a 

 constriction of the branch at the base; hydrothecae alternate or more 

 nearly opposite, more erect then in most of the other species of Abietin- 

 aria; the proximal half is all of about the same diameter, above which 

 the hydrotheca narrows to form a neck which expands slightly to form 

 the margin; two teeth are present on the abcauline side of the margin, 

 these are usually very strongly marked but in some cases are scarcely 

 noticeable. 



