104 
angia-bearing branchlets. These were namely not restricted to the inner side of 
the branches but occurred on all sides of the filaments and at various distances 
from the base, and the sporangia were usually only 11—14 „ long, 7,5—8 » broad; 
one, however, was found to be 16 long, 9,5 ~ broad. The sporangia were for a 
great part emptied, and new were formed within the sporangial wall from the 
underlying cell. As these specimens agreed otherwise with the f agama, and as 
they were found only in very small number, I may content myself with just 
naming them here; it need only be pointed out that they showed short descending 
filaments near the base. 
Ch. Thuretii 8, agama occurs in depths of 2—31 meters. In the Limfjord it 
has been observed in depths of 2—7 meters, in the other waters only in depths 
greater than 9,5 meters. It has been found growing on 
14 different species of Algæ, as species of Polysiphonia, 
stipes of Laminaria, Delesseria sangvinea, Gloiosiphonia, 
Desmarestia aculeata, Fucus serratus, further on Zostera- 
leaves and on Flustra foliacea. It has only been found 
in the months June to September, except the above 
named, somewhat aberrant specimens collected in May. 
Ripe sporangia have been met with in all the months 
named. 
Localities. Ns: aF, 31 meters. — Sk: ZK® off Lonstrup, 11— 
13 met.; (? N.W. of Hirshals, 13—15 met., May, no. 7109). — Lf: ZU. 
3 met., and XU, 4 met, in Nissum Bredning; MH in Thisted Bredning; 
off Gronnerup in Sallingsund, ca. 2 met.; LS and MI East of Mors. — 
Kn: Herthas Flak, 20— 22,5 met. (!, Borgs.); Frederikshavn; ZL? N. 
of Læsø, 9,5 met.; FF and TP, Trindelen, ca. 15 met. — Ke: Fladen, 
22,5 met. — Ks: EM, Lysegrund. — Sa: MQ, S. of Samso, 11,5 met. — 
Lb: N. of Fano Kalv, 13 met. 
Fig. 33. 7. Chantransia Daviesii (Dillw.) Thur. 
Chantransia Thuretii /, agama. From T : : a. Tr = = 
; HUR à i ; KYLIN 5 . 27. 
ee ET in LE Joris Liste p.106; Kyrın (1907) p. 117 fig. 27 
branchlets rising mostly from the spor- Conferva Daviesii Dıuwyn, Brit. Conf. 1809 p. 73, pl. F (teste specim.). 
angiferous branchlets. 300:1. Callithamnion Daviesii Harvey, Phyc. Brit. pl.314; J, Acarpn Sp. III p. 8. 
Acrochetium Daviesii NÆGEL1 (1861) p.405; BorneT (1904) p. XXII. 
This species is as a rule easily recognizable by its fairly thick, thick-walled 
and short-celled filaments and by its fasciculated sporangia-bearing branchlets. It 
is undoubtedly nearest related to Ch. Thuretii which it may sometimes very closely 
resemble, while it is very different from Ch. virgatula with which it was formerly 
often confused. Although it was the first described of all the marine species of the 
genus, it is imperfectly known in some respects, for which reason a short descrip- 
tion of the Danish specimens may be given here. 
The basal part consists of branched creeping filaments which may become 
so densely interwoven that they form a continuous basal disc. When the plant is 
growing on an irregular surface, as e.g. the stalk of Laminaria hyperborea, the fila- 
ments are very irregularly curved and may grow over one another, and the basal 
