and 4 is only met with exceptionally in the 
Danish specimens (fig. 225 B). The sporangia 
were 70—76 x long, 61—65 w broad; they are 
discharged through a transversal split above. 
The antheridia are produced on the sur- 
face of long cushions on the upper side of the 
branchlets which are much divaricate in the 
male specimens. The cushions are composed of 
two or more small bushes on each joint fused 
with each other and with those of the neigh- 
bouring joints. The outer cells only of these 
bushes produce spermatia while the under cells 
remain sterile. 
The procarps are placed on a branch- 
bearing cell opposite to the branch. They have 
the same structure as in Call. corymbosum. In 
an unfertilised carpogonium the trichogyne was 
feebly swollen at the base (fig. 227). There are 
two nearly globular gonimoblasts and under 
each of them a smaller one which may pro- 
duce carpospores as well developed as the large 
ones. The cell bearing the cystocarp is fre- 
quently shorter than the other cells in the same 
filament. 
As pointed out by NAGELI (Morph. Ceram., 
1861, p. 372), Call. Brodiwi Crovan (Alg. mar. 
du Finistère, no. 154, Florule du Finistère, 
p. 138) is not identical with Harvey’s and 
Kürzıng’s species. In the specimen of the 
Exsicc. I found the ramification generally pin- 
nate in the pinnæ and the pinnulæ as well, 
the cells much shorter and thicker and hairs 
totally wanting. Crovan’s plant has been des- 
cribed as Maschalosporium gallicum (Call. galli- 
cum Sauvageau, Alg. mar. Golf. Gascogne, Journ. 
de Botanique t. XI 1897, p. 63). It is probable 
that Harvey’s description included also this 
species (comp. Phyc. Brit. pl. 129 fig. 3—4), but 
it seems to have been worked out principally 
after specimens of the species mentioned here 
under Harvey’s name. I have had no occasion 
to examine authentical specimens. 
Fig. 227. 
Callithamnion Brodiei. Upper ends of female 
plants; A, with fully developed, B, with young 
procarp. a auxiliary mother-cells; the first cell 
ofthe carpogonial branch is not visible. A 270:1. 
B 200:1. 
Fig. 228. 
Callithamnion Brodiei. Part of cystocarp-bearing 
plant. 70:1. 
