Notes. 
589 
terminations, which form the surface of the plant. Where it comes 
into contact with the protoplasmic mass occupying the extreme end 
of the branch of the coenocyte, it enlarges into a club- or funnel- 
shaped head. The strand occupies an axial position in the coenocyte 
and probably does not come into contact with the cell-wall at any 
point. In this respect it differs wholly from the transverse bars in 
Caulerpa. 
In some of the branches the axial strand seems to be composed 
of a homogeneous refractive substance (Fig. 1). In others it is 
a tubular structure formed of a refractive material, lined and 
more or less filled up with granular matter. Where it is tubular, 
the ending in the protoplasm is open (Fig. 2). In the younger parts 
of the plant it is usually covered with a delicate coating of protoplasm, 
in which nuclei are sometimes seen. 
Fig 2. 
Figl, 
Woodcut 12. 
Fig. 1. Portion of a longitudinal section of Codium tomentosum , showing the 
longitudinal strands in two adjoining branches of the coenocyte. x t 70- 
Fig. 2. Terminal portion of a branch of the coenocyte in long section: the 
axial strand is tubular and open at the extremity, x 1 70. 
In its reactions as well as in its general appearance the strand 
resembles some form of cellulose. It dissolves in sulphuric acid ; it 
partially dissolves in ammoniacal cuprous oxide; it turns yellow in 
liquor Iodi. Neither it nor the walls of the coenocyte turned violet 
with chlorzinc-iodine ; but it does not swell as much with this reagent 
as the walls, and becomes an orange yellow. The wall of the extreme 
end of the branches often resembles the strand in these two particulars, 
and differs in them from the remaining parts of the wall. Another 
R r 2 
