heaps of paraspores were not more 
lengthened than in the other specimens 
but frequently bilobate (fig. 223). 
The species has been found repea- 
tedly sterile in April and May, frequently 
growing on Furcellaria, further on Fucus 
serratus, Delesseria sanguinea and Rho- 
mela subfusca. Twice it has been found 
with paraspores in May, but otherwise 
with paraspores in the summer months 
(June to August) and in November. 
Tetrasporangia were met with in June, 
August and September. 
Localities. Kn: Hirsholmene, littoral 
region and 9 meters (Henn. Petersen, !); Frede- 
rikshavn, harbour and Bussserev (!, Henn. Pe- 
tersen); Ostero harbour, Læsø. — Ke: IO, Fla- 
den, 10—11 meters; fl, Fladen, 30 meters, small 
specimen (C. A. J.); OO, Soborghoved Grund, 
8,5 m. — Ks: Harbour of Grenaa; OT, Hastens 
Grund, 9,5 m.—Sa: YV; the light-buoy at Hatter- 
barn N. 21/, miles, 15 meters (slender form, see 
above). — Lb: Skærbæk harbour off Kolding 
Fjord, with paraspores and tetraspores ; DB, Lille- 
grund, (slender form, sterile). — Sb: Kerteminde, 
harbour. — Su: Ellekilde Hage (Boye Petersen); 
Hellebzek,washed ashore; near Helsingør (Liebman, 
Call. pyramidatum). — Bw: dK, Pols Rev, 6—7m. 
2. Callithamnion Brodiæi Harv. 
Harvey in Hooker, English Flora, Vol. V part 1, 
1833, p. 340; Manual, 1841, p. 105, Phyc. 
Brit. Pl. 129, 1849. J. Agardh, 1851, p. 57, 
III, 1876, p. 34. Kylin, 1907, p. 162. 
Phlebothamnion Brodici Kützing, Spec. alg. 1849, 
p- 655, Tab. phye., 11. Band, Tab. 100n, 1861. 
Fig. 223. 
Callithamnion Hookeri. Slender form from 15 meters depth 
(XV). 47:1. 
Only some few specimens of the species here mentioned have been met with, 
growing on Furcellaria fastigiata collected on the Nordvestrev by Hirsholmene, in 
company with four other species of Callithamnion, Spermothamnion repens and 
others. They agree perfectly with the quoted figures and descriptions of AGARDH, 
KüTziNG and Kyrın, and it is probably justly that the name of Harvey has been 
assigned to them though it is not excluded that two species might have been con- 
founded under that name. Referring especially to the paper of Kyrın, a description 
of the Danish specimens may be given here. 
The specimens reach only a length of 1,5 cm at most. The main axes are very 
