4 
from ordinary low-water mark to two or four meters depth on moles and boulders 
in Skagerak, the northern Kattegat and the Limfjord, and it does not avoid exposed 
places. In summer, a narrow belt of dead Corallina may be found at low-water 
mark when the upper part of the Corallina-association has been exposed to the air 
during a long period of low-water. It can also occur abundantly and form asso- 
ciations in deeper water, on gravelly or stony bottom, e. g. in the eastern Kattegat, 
but it is then frequently associated with Lithothamnia. In the sublittoral region it 
descends frequently to 19 meters depth, but it has been met with at a depth of 
29 meters in the northern Kattegat. As to the vegetative development of the frond 
during the year I have no personal observations, but it must be supposed that the 
growth begins in the last part of the winter and ceases in summer, and that old 
fronds are thrown off in autumn. NELson and Duncan (Histology of cert. spec. of 
Corallinaceæ. Trans. Linn. Soc. Bot. Ser. 2 Vol. I. 1876 p. 203) indicate that there is 
not much carbonate of lime in the frond in spring. Old fronds are often corroded 
by various organisms. Ripe tetrasporangia were repeatedly met with in the months 
of May to July, unripe in March. Ripe antheridia were found in May, ripe cysto- 
carpia in May and December. 
Localities. Ns: ZQ, jydske Rev, 24,5 m; groin at Thyborøn; Klitmøller, 2 m. — Sk: Hanst- 
holm, various places, 4—15 m; YM, YN, Bragerne, 1-10 m; Bulbjerg and Svinkløv, washed ashore; SZ, 
Lokken, ZK!, ZK’, Lonstrup; Hirshals, mole and boulders near land, and 2 miles N.W. of Hirshals, 11m; 
Højen, c. 5m. — Lf: Lemvig; Ydre Ron by Lemvig; ZY; Oddesund; MD; MF, MG, MH, Thisted in 
Thisted Bredning; harbour of Struer; I; various places in Sallingsund; LS!; MI; Ejerslev Ren; Holm- 
tunge Hage; Amtoft Rev; LQ. — Kn: Harbour of Skagen; KC, TV, Krageskovs Rev; Hirsholmene; Kol- 
pen; Deget; Frederikshavn; Marens Rev, Borrebjergs Rev; Nordre Renner; TJ; TL; TH; UC; UB; ZL; 
Jegens Odde; Trindelen; FF, FE; IX; ZB, 29m; TG. — Ke: IM, VY, IP, Fladen; XA, Lille Middelgrund: 
EU, ET, II, IK, f. robusta, dominant, at 14 meters depth. Store Middelgrund: 1D, (f. robusta, 19 m), IB, 
HX, IA, 11—19m; OO, Søborg Hoved Grund, 8,5 m. — Km: XF, Læsø Rende; ZC, Kobbergrund; XB; 
XD; XC; TS; bK; FM; FN (f. robusta); ND. — Ks: Pakhusbugt, Anholt (loose); EM and EJ, Lysegrund; 
HS, Briseis Grund; OS, Hastens Grund; OU, Schultz’s Grund; D, Grenne Revle north of Isefjord; aU, 
off Lumbsaas; GF, Sjællands Rev; FO, off Havknude; NB; FP, Jessens Grund. — Sa: MZ; KK and KJ, 
south of Hjelm; KM; BE and BF, off Sletterhage, f. robusta, 10 m; MY; PL; Begtrup Vig; Kalo Rev; 
harbour of Aarhus; PK; FS, Vejre Sund N.E. of Samsø (f. robusta); MP; DK, Bolsaxen (f. robusta, 14 m); 
MQ; AH!; Korshavn; Hofmansgave (Car. Rosenberg); NZ; PK, Norsminde Flak; BC: aX, south Side of 
Endelave; Al! and DJ, by Æbelø; FY, off Bjornsknude, 5,5 m. — Lb: Only found at the harbour of 
Bogense and at FZ, Kasser Odde, the north side of the reef, 6,5 m. Never met with in the neighbour- 
hood of Middelfart and Feng, where numerous dredgings have been made. — Sb: Harbour of Kerte- 
minde; NR, at the entrance to the harbour of Korser, only 1,5 m high, on stones picked up in the belt 
(Nyborg). — In the German part of the western Baltic Sea REINKE records the species from the isle of 
Als and from Neukirchner Grund in Flensborg Fjord. At Kullen on the west coast of Sweden I have 
not met with it. 
2. Corallina rubens L. 
Linné Syst. nat. Ed. 12. Vol. I. p. 1305. Kützing, Tab. phyc. 8. Band, 1858, p. 38, Taf. 80; Solms, Corall., 
p. 42; Hauck, Meeresalg. p. 278. 
Jania rubens Lamour.; Kützing, Phyc. gener., 1843, p. 389, Taf. 79 II; Harvey, Phyc. Brit. pl. 252, 1851; 
Areschoug, in J. Agardh, Sp. g. o. Vol. II 1852, p. 557; Kny, Bot. Zeit. 1872, p. 350; Thuret, Etudes 
phye. 1878, p. 99, pl. L, LI. 
