sexual organs). Each of the auxiliary cells produces a glomerulus which is ovoid- 
globular or a little irregular. Usually a smaller conical lobe is seen at the base of 
the glomerulus. As shown in fig. 239 C the glomerulus is supported by a large ste- 
rile cell, the “Centralzelle” of OLTmanns, while the small lobe is given off from the 
stalk-cell of the auxiliary cell (the “Basalzelle” of OLrmanns and Kyrın 1923). The 
conical body cannot therefore belong to the gonimoblast and it must be concluded 
that it is unable to produce normal carpospores. A similar smaller lobe developed 
under the primary glomerulus has first been mentioned by JanczEwskı (1877, p. 
119) in Call. tetricum and later by OLTmanns in C. corymbosum (1898, p. 118) and 
KyziN (1907) in C. fruticulosum, C. spiniferum and C. Brodiei, comp. above p. 316. 
In the cases described by JaAnczEwskı and OLTMANNS, however, the smaller lobe 
arises from the same cell, the central cell, which has produced the glomerulus 
and is therefore a part of the gonimoblast. — The cystocarp-bearing cells remain 
shorter than the sterile cells of the filaments. 
This variety has been found growing on various Algæ, e. g. Furcellaria and 
Cladophora rupestris, in 1 to 8 meters depth, with sexual organs and ripe sporangia 
in May to September, with cystocarps in July to October. 
Localities. Kn: 6!/, miles S.W. by W.1/, W. of Læsø Trindel light-ship, 8m (C. A.J.) — Ke: 
Gilleleje; on the shore at Nakkehoved (?) (Lyngbye). — Su: off Ellekilde; Hellebæk; Blokhus Grund 
(Henn. Petersen). 
4. Callithamnion corymbosum (Engl. Bot.) Lyngbye. 
Lyngbye, 1819, p. 125, tab. 38 C; J. Agardh, 1851, p. 41; Harvey, Phye. Brit. III, 1851, pl. 272; Thuret, 
Et. phyc., 1878, p. 67, pll. 33—35; Reinke Algenfl. 1889, p. 24; Oltmanns, Bot. Zeit. 1898, p. 114, 
Taf. VI-VII; Kylin, 1907, p. 165; Kolderup Rosenvinge, 1911, p. 25; 1920, p. 25. 
Conferva corymbosa Engl. Bot., pl. 2352, 1812. 
Ceramium pedicellatum Lyngbye, Flora Dan. tab. 1596, 2, 1818.! 
Phlebothamnion corymbosum Kützing, Spec. Alg. 1849, p. 657, Tab. phye. XII Taf. 9. 
Poecilothamnion corymbosum Nägeli, 1861, p. 360. 
Callithamnion hiemale Kjellman in Kylin 1907, p. 170, ex parte. 
Referring the reader, for the ramification, to the papers of NAGELI, Kyrın and myself 
(1920), I shall only mention that the branches are usually arranged in a spiral with 
an angle of divergence varying between !/; and !/;, the spiral turning with equal 
1 In the herbarium of the Botanical Museum of Copenhagen a number of specimens of this 
species from Hofmansgave are to be found together with a leaf with drawings of the same species by 
LYNGBYE with the following remark in LYNGBYE's handwriting: Ceramium roseum Var.? Nov. 1815 Hof- 
mansgave, and signed with the letters A—D. The three last of these figures have been reproduced in 
Fl. Dan. Tab. 1596, 2 (under the name Ceramium pedicellatum). Fig. A which represents the habit of 
the species in feeble magnification and shows the corymbous ramification is in Fl. Dan. replaced by 
another figure which agrees fairly well with the fig. 38 C1 of Lynepyr’s Hydr. but does not give a 
good idea of the ramification of the species. Confusion with another species has perhaps taken 
place. The fig. C (the undermost, to the left) which shows antheridial bushes has also been rightly 
interpreted, for LYNGBYE has marked it: “C mas?”. Fig. D shows the upper sporangium opened with 
a split in the original drawing, but that has not been reproduced in the engraving. 
D. K. D. Vidensk. Selsk. Skr., 7. Række, naturvidensk. og mathem. Afd. VII. 3. 42 
