265 
and was not found by NıcnorLs. The sporangia are disporic; they were found to 
be 105—140 y long, 35 - 60 broad; the smallest ones, however, were perhaps not ripe. 
Antheridial conceptacles were not observed. 
Cystocarpic conceptacles were only found in specimens from one locality (Kalô). 
They are of the same shape and size (about 400 » in diameter) as the sporangial 
ones, and the ostiole is of the same structure, being without or only with poorly 
developed papillæ in the under part. The carpospores are only produced at the 
periphery. 
This variety has only been found growing on Fucus vesiculosus and Fucus 
serratus a little below low-water mark. It is particularly abundant in the Limfjord, 
probably owing to the high salinity and the high summer temperature of this 
: Fig. 185. i 
. Lithophyllum macrocarpum f. intermedia. A, vertical section of not quite ripe sporangial conceptacle. B, orifice of 
sporangial conceptacle seen from above. C, vertical section of orifice of cystocarpic conceptacle. AandC200:1. B 350: 1. 
water. Ripe sporangia have been met with in summer, June to September. In 
April two-parted sporangia were found, but not fully ripe, and in the same month 
cystocarpia were found. 
Localities. Lf: Sondre Ron by Lemvig; Oddesund; MH, bank of Skrandrup, MG, off Hanklit, 
and Thisted in Thisted Bredning; I, Veno Bugt; Nykebing; Sallingsund, pier; Amtoft Rev; LQ, Lendrup 
Ren; Løgstør. — Kn: Hirsholm and Kelpen near Frederikshavn. — Ks: Isefjord: on the beach near 
Frederiksværk (Th. Mortensen); Lammefjord; Holbæk Fjord. — Sa: Reef near Kalo; Æbelø. — Sf: near 
Birkholm. 
3. Lithophyllum Corallinæ (Crouan) Heydr. 
F. Heydrich, Corallineae, insbes. Melobesieae. Ber. deut. bot. Ges. Bd. 15, 1897, p. 47. 
Melobesia Corallinæ Crouan, Florule du Finist., 1867, p. 150, pl. 20, genre 133 bis, fig. 6—11. 
Lithophyllum pustulatum (Lamour.) Fosl., f. Coralline (Crn.) Foslie, Remarks, 1905, p. 118. 
In two localities in the Skagerak a few specimens of a calcareous alga were 
found growing on Corallina officinalis and agreeing with the short description and 
D. K. D. Vidensk. Selsk. Skr., 7. Række, naturvidensk. og mathem. Afd. VII. 2. 34 
