BIGELOW: COAST WATER EXPLORATION OF 1913. Silas 
are more branched than usual, so much so, that if they were examined 
by themselves they would scarcely be recognized as belonging to the 
species. The branching sometimes is far from being regular, the 
position and the length of the branches vary so much. From a stem 
that is otherwise normal, there may be one or two hydrothecae borne 
on much elongated pedicels, arising either as ordinary hydrotheca 
pedicels, or in the axils of these. They are annulated slightly at both 
ends as well as towards the centre, with smooth places between 
(Fig. 76). The stem internodes, which typically are quite uniform in 
length, vary much in this respect in some specimens and the nature 
of the geniculation at each node also varies. ‘The terminal internode 
may be much prolonged into a tendril-like process such as occurs late in 
the season in Campanularia angulata, Obelia commissuralis, and other 
similar species. These tendrils are noticeable chiefly on account of 
their breadth and the bluntness at the end (Fig. 77). Within the 
Fic. 77.— Obelia geniculata. 
\perisare, at the end, the coenosarc has the appearance of a developing 
hydranth but no case was observed where such a hydranth had really 
_Jeveloped. 
In a previous paper! I referred to a specimen of this species in which 
the gonophores were in an unusual position. In this material a still 
sreater variation occurs. Some gonophores are placed typically, 2. ¢., 
n the axils of the hydrotheca pedicels. Others appear as those in 
jhe above reference, 7. ¢., in place of hydrothecae (Fig. 76). Besides 
hese there were several in a row growing directly from the stolon 
Fig. 78). They have similar short, annulated pedicels to those in 
ne normal position and agree very well with them in other respects, 
Ithough they are slightly larger than the others usually are. The 
evelopment has not been stopped at any rate, as the young medusae 
ere in as good condition as they were in any of the others. If the 
' 
, 
f Hydroids from Nova Scotia. Victoria Memorial Museum, Bull., 1913, no. 1, p. 167. 
| 
| 
| 
; 
| 
t 
