170 
VICTORIA MEMORIAL MUSEUM. BULLETIN NO. 
Halecium tenellum Nutting, Hydroids of Woods Hole, 1901, 
p. 357. 
Common on ascidian stems in 50 fathoms of the Can so Banks. 
Lafceim. 
Genus Cryptolaria. 
Cryptolarxa triserialis new species. 
Plate XIII, figs. 1 and 2. 
Trophosome. Stem fascicled, very coarse. No complete 
colony was obtained. The largest fragment was 4 cm. long 
and 0*8 mm. in diameter. There were several large branches 
given off from the main stem. On the stem the hydrothecse are 
not numerous; they appear singly or in opposite or sub-opposite 
pairs, each with about the distal half free. On the branches, 
where they are free from fasciculation, the hydrothecse are 
nearer together, arranged in three series, two making such a 
wide angle with each other that they are not far from being 
in the same plane, and the other intermediate between them 
on the larger side. The hydrothecse of the first two series 
appear in pairs, those of the other alternate with these pairs. 
They are large, from 1*5 to 2 mm. in length and 0*35 mm. in 
diameter. The proximal half is in contact with the branch, 
the distal half curves regularly outward. 
Gonosome. Unknown. 
Distribution. Dredged in 20 fathoms off Durell island, 
Chedabucto bay, Canso. 
In some respects this species resembles Cryptolaria borealis 
Levinson 1 . His description is rather meagre, but as his colonies 
were only from 4*5 to 20 mm. long, the species must be a 
much smaller one than that herein described. On the non- 
fascicled branches, the hydrothecse are arranged in four series, 
giving a cruciform arrangement, while in this species there are 
but three series. These differences alone seem sufficient to 
indicate that the Canso specimens are of a different species 
to those found in Davis strait. 
VMeduser, Ctenophorer og Hydroider fra Grcenlanda Vestkyst, 1893, p. 31. 
