345 
in specimens from SY, north of Lokken. These specimens were more vigorous than 
the typical C. Furcellariæ and partly showed another arrangement of the tetrasporangia, 
these being partly terminal on short branchlets (fig. 273). It might further be men- 
tioned that a small specimen with unripe round, not lobed gonimoblasts but other- 
wise agreeing with C. Furcellarie was found on Herthas Flak in the Northern Katte- 
gat. Typical specimens of the same species have repeatedly been found in the same place. 
Localities. Sk: SY, north of Løkken, 1 mile (+ © 8)! (aberrant); ZK!? off Lønstrup, 8,5 m 
(+ 8); Hirshals light-house in S.E. 21/, miles 13m (+98), aberrant); XO, Mollegrund off Hirshals 
11—15 m (+ 8). — Lf: Oddesund, 6,5 m. — Kn: FG and XJ, Herthas Flak, 19—22,5 m (4 © + 7): 
ibid. F. Børgesen (+ 9); fE, Krageskovs Rev; Nordostrev at Hirsholm, 7,5—9,5 m ($ © + 7); harbour 
of Frederikshavn (+ © 7); TP and TO, Tonneberg Banke, 16—18m (4 © + 9); fG, 3 miles W. of 
Læsø Trindel light-ship, 15 m (© + 10); TR, near Trindelen, 23,5 m (+ 9). — Ke: VZ, Groves Flak, 
24,5 m; Groves Flak, F. Borgs. (O + 9); ZF, near Fladens light-ship, 22,5 m (+ 7); 1 mile W. by N. of 
Fladens light-ship, 17 m (+ ©) 10). — Km: VN, near the entrance to Randers Fjord. — Ks: RL, near 
Ostindiefarer Grund, 15m ($ © + 7); D, near Grønne Revle, 11,3 m (© 7); aU, Lumbsaas church in 
S. 32° W., 2 miles (©, sporg. 8). — Sa: YV, near Hatterbarn, 15 m (2 2s 6); AO, Endelaves Sydostflak; GC, 
north of Fyn, 13 m. — Lb: Fænø Sund (2s + 6); CF, west of Lyø, 15 m; DX, Vodrups Flak, 13 m (sporg. 5). 
— Sf: CZ, south side of Hornenzes, 9,5—15 m (+ 5); UX, at the North end of Ærø, 9,5 m; UV north of Ærø, 
13 m (2s 5). — Sb: cN, S.W. of Musholm, 18 m (2s 6); AF, Mollegrund, 7,5 m; DN, Vengeance Grund, 12 m 
(sporg. 5); LH, off Bostrup, Langeland. — Su: HK off the N.W. end of Hveen, 9,5—21 m; QC, east side of 
Saltholms Flak. — Bw: bV, N.E. of Kobbel Skov (sp. 6); Middelgrund south of Als, 13 m (2s 6); bY, off 
Sonderskov, Als; cG, Trindelen, West side of Kegnæs; cF, south of Kegnæs light-house; LE, North Side 
of Vejsnæs Flak, 9,5 m. — Bm: QN, off Køge Sohuse, 6,5 m; QS, north of Mogens Klint, 20,7 m (+ 7); 
VG, north of Moens Klint, 17 m; 7 miles N.E.+/, W. of Hestehoved light-house, south of Moen, 11—13 m 
(st. 6) (G. A. J.). — Bb: 8 miles S. 1/, E. of Rønne, 11—19 m, (st. 6) (C. A. J.); SL, off Allinge, 5,5—11,3 m 
(+ 8); 3 miles S.S.E. of Nexo, 21 m (st. 6) (C. A. J.); YD, near Salthammer Rev 19 m; YC near Salt- 
hammer Rev 24,5 m (+ 7); 7 miles S.E. ®/, S. of Adler Grund light-ship, 20 m (st. 6) (C. A. J.). 
7. Callithamnion sp. 
In October 1922 I found a small specimen of a Callithamnion growing on 
Desmarestia aculeata dredged in a depth of 30 meters at Fladen in the eastern Katte- 
gat. As this specimen, which is only 3 mm high, cannot be referred with certainty 
to any known species, it is described here in the hope that it may later be identified. 
The branching is strictly alternate, biseriate or pectinate, all the branches falling in 
the same plane. The branches of the main axis (stem) are regularly distichous from 
the base, and the ramification of the main branches is the same, with the exception 
that the two or three first branches of the second order are seriate on the upper side 
of the branch, and in the lowermost main branches the first 1 to 4 joints bear no 
branches at all. In the branches on the upper part of the plant the secund bran- 
ching of the branches is very manifest, in particular in the branches with limited 
srowth in which the number of pinnule arranged in a row on the upper side of 
the pinna may be greater, up to 9. This secund branching of the pinnulæ gives the 
1 + designates tetrasporangia, 2s disporangia, sp young sporangia, ® procarps, ©) eystocarps, the 
number at last the number of the month, 
