265 



and was not found by Nichols. The sporangia are disporic; they were found to 

 be 105 — 140// 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 (Kalo). 

 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 papillae in the under part. The carpospores are only produced at the 

 periphery. 



This variety has only been found growing on Fucas vesiculosas 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. 



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. A and C 200 : 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 R0n by Lemvig; Oddesund; MH, bank of Skrandrup, MG, off Hanklit, 

 and Thi.sted in Thisted Bredning; I, Vena Bugt; Nykabing; Sallingsund, pier; Amtoft Rev; LQ, Lendrup 

 R0n; Logstar. — Kn: Hirsholm and Kelpen near Frederikshavn. — Ks : Isefjord: on the beach near 

 Frederiksvserk (Th. Mortensen) ; Lammefjord; Holbaek Fjord. — Sa: Reef near Kala; .iEbel0. — Sf: near 

 Birkholm. 



3. Lithophyllum Corallinae (Crouan) Heydr. 



F. Heydrich, Corallineae, insbes. Melobesieae. Ber. deut. hot. Ges. Bd. 15, 1897, p. 47. 

 Melobesia CoralUnce Crouan, Florule du Finist., 1867, p. 150, pi. 20, genre 133 bis, fig. 6—11. 

 Lithophyllum pustulatum (Lamour.) Fosl., f. CoralUnce (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 shoi't description and 



D. K. D. Vidensk. Selsk. Skr., 7. R;ekke, naturvidensk. og mathem. Aid. VII. 2. . 34 



