species was unknown to me 
I tried to get other individuals in the same locality 
and in other similar places but without success. The only existing little specimen 
Fig. 615. 
Atractophora sp.? A, tip of frond. 625 : 1. 
B, portion of branch. 440 : 1. 
showing a very characteristic structure, I think it 
useful to give a short description of it and some 
figures in order to render an identification of the 
species possible. 
The frond has a distinct axial cell-row which 
bears at each joint a whorl of branches, from the 
base of which downward growing cell-rows issue, 
which form a thick cortex surrounding the axial 
cell-row. The branches are mostly pinnate, with 
opposite branchlets and with limited growth; branch- 
lets of the second order may occur. Many of the end- 
cells of the pinnæ and pinnulæ bear a hyaline hair. The 
lowermost branches are simple or feebly branched. 
Branches of the same kind as the primary axis, 
with enduring growth, occur. The colour of the plant 
is brownish-purple, somewhat resembling that of 
Plumaria elegans. 
The plant recalls Atractophora hypnoides in 
the general structure’; but it differs so much that 
it cannot be identified with it. As I had no material 
for comparison, I applied to Mr. E. CHEMIN at Paris who has most kindly sent 
me some dried specimens of 
Atr. hypnoides from the north 
coast of France. An examina- 
tion of these specimens, some 
of which were young, con- 
firmed that the plant from 
Deget was decidedly differ- 
ent from Atr. hypnoides. The 
branches of the latter are 
similar to the primary axis, 
bearing shoots on all sides, 
and the cortex built up of 
! Comp. CROUAN, Ann. d. 
scienc. nat. III ser. t. 11, 1848, 
p. 371, pl. 11 A; NäÄcELIı, Morph. 
u. Syst. d. Ceram. 1861, p. 388; 
ZERLANG, Flora 1889; Kyrin, Ent- 
wick. Florid. Studien. 1928, p. 12; 
o C 
© PRA GD {ONS VG 
Ga 057 JO GROSS 
OO JO o DOM 
TOG B GS SE ROSH 
Cha) do PVO QS IS 
© ROC o op OS 60 20 
en 8 PO Go OS CV 
Ro E90 SP En 
B01 OÙ 
(Ome) 
Rey | 
Fig. 616. 
Atractophora sp.? Portion of the ‘main axis. The cell-rows of the cortex 
are a little separated by pressure. The long cells of the axial cell-rows 
are to be seen in the middle. 625 : 1. 
E. CHEMIN, Sur le développement des spores de Naccaria Wiggii Endl. et Atractophora hypnoides Crouan, 
Bull. soc. bot. France, t. 74, 1927, p. 274. 
