207 
ND, off Fornæs, 11,5—13 m. — Ks: HR south of Hesselo; shore at Gilleleje; D, off the entrance to Ise- 
fjord; Oure, near Roskilde and Boserup in Isefjord. -- Sa: FS, Vejre Sund; PG, west of Hatter Rev; 
north end of Besser Rev; north-side of Revsnæs (Ostenfeld); shore by Koldby Kaas; Bolsaxen; Hinds- 
holm (Lyngbye); NZ, off Torreso; Odense Fjord, inner side of Enebærodden (!) and shore at Hofmans- 
gave (Car. Rosenberg); Juelsminde. — Lb: OB, off Stavrshoved; Snoghoj, Middelfart, Fæno a. o. places 
from 0 to 19 meters; CE, south of Helnæs, 26 meters. — Sf: UV, north of Ærø; Birkholm. — Sb: 
Refsnæs; Romsø Sund (Ostenfeld); NU, off Strandskoven near Bogense; stone reef at Korsør; GP, Hal- 
skov Rev; near Sproge, 10—15 m (Ostenfeld); AC, off Knudshoved, 17 m; DN, Vengeance Grund; Ny- 
borg Fjord, shallow water; near Vresen, 23—24 m (Ostenfeld). UT and US! in Langelandsbelt, about 
19 m. — Sm: Karrebæksfjord off Skraverup (Warming); Guldborg (C. Christensen); HF, west of Faro. — 
Su: bM south of Hveen, 22,5 m; Hvidere; off Charlottenlund; south end of Middelgrund; Trekroner 
(Rützou); QC, QD, Saltholms Flak; PR! off Dragor, 4m. — Bw: DV, south of Marstal; LC, near Gul- 
stav, 11m; UP off Kramnisse Gab; UM, Kadetrenden. — Bm: HG, Præstebjerg Rev, 7 m; QS, N. of 
Moens Klint 21m; at Moens Klint; VD, Bogestrommen; QQ off Rødvig; RG, N.W. of Falsterbo; ON, off 
Koge Sohuse 6,5 m. — Bb: SF, Adler Grund; SH, Ronne Banke; Off Ronne, 13 and 38 m (Borgesen, !), 
reef at Ronne; Davids Banke, 29m; off Gudhjem; YA, east of Dueodde lighthouse 38 m; Christianso. 
1. Hildenbrandia Crouani J. Agardh. 
J. Agardh, Spec. G. O. II, 1852, p. 495, III, 1876, p. 379; Batters in Journal of Botany 1897, p. 438. 
Hildenbrandtia rosea Crouan, Florule de Finistère, 1867, p. 148, pl. 19 fig. 126, non Kützing. 
In the Little Belt I found by dredging in depths of 15 to 19 meters a stone covered 
with crusts of a Hildenbrandia which in hanit scarcely differs from H. prototypus. 
It forms pretty blood-red crusts with similar conceptacles. In the structure of the 
frond and the shape and dimensions of the conceptacles it agrees also with the 
named species. The cells are 6—7 u broad and contain a calotte-shaped chromato- 
phore, the conceptacles are up to 100 in transverse diameter. On the other hand, 
it differs decidedly by its cylindric sporangia divided by parallel oblique walls, in 
which respect it agrees with Hildenbrandia Crouani J. Agardh. 
This species was first described on the basis of specimens sent from Crouan, 
but, as shown by AGARDH and BATTERS, the brothers Crovan have confounded it 
both with H. rosea Kitz. (H. protolypus) and with Hematocelis rubens J. AGARDH 
(Batters lI. c. p. 438). I have had an opportunity of comparing my specimens with 
those in AcarpnH’s herbarium sent from Crovuan (herb. AGARDH no 27613 “roches 
de l’anse du Corsens, environs de Brest”) upon which his description is founded, 
and I have found them fully agreeing. I found also accordance with microscopical 
preparations from BATTERS in AGARDH’s Herbarium. 
The conceptacles are similar in structure and development to those of H. pro- 
totypus. The cell-rows in the peripheral part of the roof are much bent inward 
below, in consequence of the transverse growth of the undermost cells, as some- 
times also occurs in H. prototypus (comp. p. 204), while the cell-rows in the inner 
part of the roof decay. The sporangia are produced, as in H. prototypus, from the 
bottom and the sides, and also from the peripheral part of the roof. A little stalk- 
cell is present; J. AGARpH has already perceived that the sporangia are pedicellate, 
but he wrongly indicates that the stalk is articulated (Sp. III, p. 379). The spor- 
