474 
Localities. Ns: ZQ, jydske Rev, 24,5 m; aF, off Thyboron, 31 m; XR, off Klitmoller, 12 m; 
YT, Hanstholm, 15 m. — Sk: eV; Dana 2902; eY; eZ: several places off Lonstrup, off Hirshals, mole at 
Hirshals, everywhere were scarce. — Lf: Wanting. — Kn: Skagen harbour; Herthas Flak; Krageskovs 
Rev; around Hirsholmene; Frederikshavn, harbour and environs; UC, TL and ZP, at Nordre Ronner; 
several places near Læsø Trindel, 11-~21 m. — Ke: Fladen, 16—30 m; Groves Flak, 19—32 m; Lille Middel- 
grund; ER, Fyrbanken, 28 m; IE; RU; RV; Store Middelgrund; Gilleleje. — Km: Læsø Rende: BN, 
off Asaa; Dana St. 2884 (C. A. J.). — Ks: Grenaa harbour; PF, Jessens Grund, 4 m; EJ, EM, Lysegrund; 
at Hesselo (Lyngbye); RL, 15 m; D, north of Grønne Revle, 11 m; aU, off Lumbsaas, 13 m; GF, GG, 
Sjællands Rev, 4—8,5 m. — Sa: GD, north of Sejerø; PC, MY, north of Samsø; stony reef in Begtrup 
Vig; Aarhus harbour; FV; FX; FY; GC, east of Æbelø; Hofmansgave (Lyngb., Hofm. Bang); AH!, Lille- 
grund at Fyns Hoved, 13 m; Korshavn; MP; DK, Bolsaxen; PF, off Refsnes. — Lb: AX; OB; AL 
(Baaring Vig); AN; Middelfart harbour; common in the belt at Middelfart; Fæno Sund; cX; DG; dC; 
DF; DD; DE; DA; CC; CY; dQ; dE; dH, east of Hesteskoen. — Sf: CU; UV; Svendborgsund several 
places, f. egagropila at 5,5 m depth. — Sb. Very common: GT, off Asnæs; GU; GS; AG; GV; cN; Kerte- 
minde harbour; NU; cL; GP; NN; Z; AB; AC; BS; BT; between Sprogø and Korsør (Magnus); UE; 
DN; UF; UH; UT; DP; UI; Spodsbjerg; LH; DQ; DR; US, over 38m; US!; DS; DT; LB; UR. — Sm: 
HA, HB, Agersosund; CK; Q. — Bw: bX, off Kobbel Skov; CD, CE, Middelgrund south of Als; dO; 
dP; dK, Pols Rev; DX, Vodrups Flak; UY, Vejsnæs Flak; DV; DU; UL, Øjet, 20 m; LA; KX; KU; UM, 
25 m. — Bm: HG, Præstebjergs Rev; VH, south of Moen; VG, n. of Mogens Klint; QS; SD; QO; QM; 
PR, off Dragor. — Bb: F. sublinearis: Ronne; XZ!, Davids Banke; SP, off Svaneke, 28m; YD; YA, 
east of Dueodde, 38 m. 
Subfam. Delesseriez. 
Apoglossum J. Agardh. 
1. Apoglossum ruscifolium (Turner) J. Agardh, 1898 p. 194; Kylin 1923 p. 83. 
Fucus ruscifolius Turner, Trans. Linn. Soc. t. 6 p. 127, tab. 8 figs. 1—2, 1801. 
Delesseria ruscifolia (Turn.) Lamouroux, Essai 1813 p. 124; Harvey Phyc. Brit. II pl. 26, 1846; J. Agardh 
1852 p. 695; Kützing Tab. phye. XVI tab. 12, 1866; Buffham 1893 p. 296 pl. 14; Kuckuck 1894 
p. 256 (antheridia); Phillips 1898 p. 188; Kolkwitz 1900 pp. 45, 46; Nienburg, Z. Entwickl. d. 
Florideenkeimlinge, Hedwigia Bd. 51, 1912, 
p. 299; Kylin, Keimung der Florideensporen, 
Arkiv f. Botanik 1917 p. 21. 
U Two specimens only of this prett 
(} OD P y pretty 
Ol Is lo little Alga have been met with in the 
N ” Danish waters, I must therefore refer 
the reader for the structure and 
D development of the frond and of the 
¢ organs of fructification to the recent 
paper of Kyrın (1923). It must only be 
noted that, according to my observations 
many years ago at Biarritz, the adven- 
titious branches do not arise from any 
Fig. 437. 
A, Apoglossum ruscifolium (Biarritz), part of mid-rib in super- a 2 i 3 
ficial view. e endogenous branch budding from the central Superficial cell of the mid-rib, as main- 
cell which, is) not visible. 700:1. B and C, Hypoglossum tained by KyLin (1923 p- 85), but by 
Woodwardii, similar views; the central cells are shown be- 5 i 
hind the cortical cells. ‘240 : 1. endogenous budding from the central 
