207 



ND, off Fornses, 11,5— 13 m. — Ks: HR soutli of Hessela; shore at Gilleleje; D, off the entrance to Ise- 

 fjord; Our0, near Roskilde and Boserup in Isefjord. — Sil : FS, Vejr0 Sund ; PG, west of Hatter Rev; 

 north end of Besser Rev; north-side of Revsn£es (Ostenfeld); shore hy Koldhy Kaas ; Bolsaxen; Hinds- 

 holm (Lyngbye); NZ, off Torresa; Odense Fjord, inner side of Enebterodden (!) and shore at Hofmans- 

 gave (Car. Rosenberg); Juelsminde. — Lb: 015, off Stavrslioved ; Snogiioj, Middelfart, Fsena a. o. places 

 from to 19 meters; CE, south of Hehia?s, 2() meters. Sf: UV, north of ^Ero; Birliholm. Sb: 

 Refsnas; Romso Sund (Ostenfeld); NU, otf Strandskoven near Bogense; stone reef at Korsor; 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, 2.3- 24 m (Ostenfeld). UT and US' in Langelandsbelt, about 

 19 m. — Sm: Karrebffiksfjord off Skraverup (Warming); Guldborg (C. Christensen); HF, west of Faro. — 

 Sii: bM south of Hveen, 22,5 m; Hvidore; off Charlottenlund ; south end of Middelgrund; Trekroner 

 (Riitzou); QC, QD, Saltholms Flak; PR' off Drager, 4 m. — Bw: DV, south of Marstal; LC, near Gul- 

 stav, 11m; UP off Kramnisse Gab; UM, Kadetrenden. — Bill : HG, Pnestebjerg Rev, 7 m; OS, N. of 

 Maens Klint 21 m: at M0ens Klint; VI), Hogestr0mmen ; (JQ off Rodvig; RG, N.W. of Falsterbo; QN, off 

 Koge Sohuse (5,5 m. — Bb : SF, Adler Grund; SH, Bonne Banke; Off Ronne, 1.3 and 38 m (Borgesen, !), 

 reef at Ronne; Davids Banke, 29 ni; off Gudhjem; YA, east of Dueodde lighthouse 38 m; Christians0. 



3. Hildenbraudia Crouanii J. Agardh 



J. Agardh, Spec. G. O. II, 1852, p. 495, III, 1876, p. 379; Batters in .Journal of Botany 1897, p. 438. 

 Hildenbiundtia rosea Crouan, Florule de Finistere, 1867, p. 148, pi. 19 fig. 126, non Kiitzing. 



In the Little Belt I found by dredging in depths of 15 to 19 meters a stone covered 

 with crusts of a Hildenbiandia which in hanit scarcely differs from H. proioiijpiis. 

 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 fj. broad and contain a calotte-shaped chromato- 

 phore, the conceptacles are up to 100 p. 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 Hildenbraudia Croiiani J. Agardh. 



This species was first described on the basis of specimens sent from CrouaiN, 

 but, as shown by Agardh and Batters, the brothers Crouan have confounded it 

 both with H. rosea Kiitz. {H. prototijpus) and with Hcvmatocelis rubens J. Agardh 

 (Batters 1. c. p. 438). I have had an opportunity of comparing my specimens with 

 those in Agardh's herbarium sent from Crouan (herb. Agardh no 27613 "roches 

 de I'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- 

 totijpus. 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. Agardh has already perceived that the sporangia are pedicellate, 

 but he wrongly indicates that the stalk is articulated (Sp. Ill, p. 379). The spor- 



