269 
The cells of the vertical cell-rows are proportionally short, and connected with trans- 
versal pits. Only empty conceptacles were found. They are about 420-—500 » in 
diameter, conical-subhemispherical, somewhat lower in proportion to the breadth 
than in L. macrocarpum. The roof is of solid structure and is very thick near 
the ostiole. The cells surrounding the upper part of the ostiole are elongated but 
not projecting as free papillæ. Our alga reminds one of L. pustulatum f. australis Foslie 
(Remarks, p. 117, Nicozs, Contrib. II, 1909, p. 356, fig. 21—24) from which it differs, 
however, to judge from Nicnozs’ description, by the want of papille surrounding 
the ostiole. As the conceptacles were empty, their nature could not be determined. 
Locality: Ke: Store Middelgrund 19 meters, May. 
Corallina L. 
1. Corallina officinalis L. 
Linné, Fauna Suecica 1761, p. 539; Kützing, Phyc. gener., 1843 p. 388, Taf. 79, Fig. 1; Harvey, Phyc. Brit. 
II, 1849, pl. 222; J. E. Areschoug in J. Agardh, Spec. II, 2, 1851-52, p. 562; Kützing, Tab. phyc. 
Vol. 8, 1858, Tab. 66—68; Kny und Magnus, Ueber ächte und falsche Dichotomie im Pflanzenreich. 
Botan. Zeit. 1872 Sp. 708; Thuret, Etudes phycologiques, 1878, p. 93 pl. 49; Solms, Corallinenalg., 
1881 (Corallina mediterranea); Hauck, Meeresalg., p. 281; Guignard, Dév. et const. des anthérozoides. 
Revue gén. T. I, 1889, extrait, p. 50, pl. VI fig. 24—26 (spermatia); B. M. Davis, Kerntheilung in 
der Tetrasporenmutterzelle bei Corallina offic. Ber. deut. bot. Ges. 1898, Bd. 16 Heft 8, p. 266; K. 
Yendo, Corallinz veræ japonicæ. Journ. Coll. of Science. Imp. Univ. Tokyo. Vol. XVI. Art. 3, 1902, 
p. 28, pl. III fig. 11—13, pl. VII, fig. 10—13; id., Study of the genicula of Corallinæ. Ibid., Vol. XIX, 
Art. 14. 1904; id., A revised list of Corallinæ. Ibid., Vol. XX, 1905, p. 29; Oltmanns, Morph. u. Biol- 
d. Algen, I, 1904, p. 562. 
The articulated fronds are given off from a basal crust much resembling some 
crustaceous Lithothamnia (comp. Harvey, |. c.). In some cases it is rather small 
and gives off numerous closely placed fronds from almost its whole surface. In 
other cases it is widely extended, up to 2,4 cm. in diameter or more, and bears 
only a small number of erect fronds (fig. 192). The border 
is lobed, the lobes being now broad, now narrow. In the 
latter case the lobes are more or less branched and often 
keep their independence, being separated by deep furrows 
when meeting, but it also happens that they grow partly 
over each other; in other cases, however, they are con- 
fluent. Concentric zones are sometimes very distinct. In 
the anatomical structure they resemble the crustaceous 
Lithothamnia, showing a hypothallium consisting of long 
cells running in a horizontal direction and a perithallium Fig. 192. 
: r Corallina officinalis. Basal crust 
composed of ascending filaments of shorter cells. The last th scattered articulated fronds 
cell of the latter is very short, the penultimate proportio- or scars after them; at right it 
. meets with a crust of a Litho- 
nally long. There seems to be a continuous layer of non- Salon et. 
