302 
are divided into internodes of different length, each bearing 1—4 
pairs of opposite hydrothecae, and as a rule the internodes of the 
proximal half of the branch have a larger number of hydrothecae 
than those of the distal half, in which, therefore, most of the 
short internodes are found. 
The hydrothecae, which are placed on the frontal side 
of the colony, are adnate to the stem and the branches with a 
portion of their adcauline wall which rarely attains the half length 
of the latter. Besides, the hydrothecae of each pair are contiguous 
in the two thirds of their length and the single pairs of hydro¬ 
thecae belonging to the same internode are connected with each 
other in such a way, that a larger part of the adcauline wall of a 
proximal hydrotheca is adnate to a smaller part of the abcauline 
wall of a distal hydrotheca. They are elongately vase-shaped, and 
their free distal ends are turned obliquely outwards, those belonging 
to each pair of hydrothecae forming with each other an angle of 
c. 70°. The aperture is twice as broad as high and provided 
both with well-developed lateral teeth and with a well-developed 
median projection, which divides the adcauline sinus into two 
lateral halves. There is found a well-developed, outwards sloping, 
angularly bent adcauline membrane. 
Each branchiferous internode of the stem is provided with a 
pair of subopposite hydrothecae, which in the proximal part of the 
stem are divided from each other by an interstice, the breadth of 
which graduallv decreases distally according to the decreasing 
breadth of stem, and at last they coalesce with each other in a 
si milar way as in the branches. Sometimes this coalescence may 
take place already in the fourth internode, sometimes not before 
the seventli. Besides there is found a single hydrotheca distally 
to each branch. In most colonies more or less of the proximal 
stem internodes have lost their hydrothecae which, however, have 
left distinet traces of their presence. 
Of this species I have seen 70 colonies which rise from an 
interlacing stolonic network, tixed to a w r orm-tube. Paumben (India). 
Depth I fathom. (C. F ristedt). 
