208 



angia were found to be 19 — 30// long, 6 — In broad; the normal length of the fully 

 ripe sporangia is probably nearest the upper limit indicated. The sporangia have 

 thus the same length as those of //. prototijpns, but are narrower. 



Zonate sporangia, divided by transverse walls, were described and figured in 

 Hildenbraiulia rubra Harvey in Phycol. Brit. pi. 250, 1851; but it is rather probable 

 that this figure really represents H. prototypus, as it shows tlie same shape of the 



Fig. 120. 



Ilihlenhrandiii Croiiani. Vertical sections of i^onceptacles. !jCO:l. 



sporangia as in this species, and the pretended zonate division might then be due 

 to an inexact observation of the irregularly divided sporangia. 



Zonate sporangia have furtlier been described in H. prototijpiis var. kergiielensis 

 AsKENASv (Forschungsreise S. M. S. Gazelle. Botanik, Berlin 1888 p. 30), the sporangia 

 of which are said to be cylindric and divided by exactly parallel walls in 4 parts. 

 As nothing is said with regard to the direction of the walls it must be presumed 

 that they are transverse. It otherwise differs from H. Croiiani by its conceptacles 

 being up to 200 // high but only half as broad, while those of H. Croiiani are broader 

 than high. 



Locality. Lb: Opposite to Middelfart, 15— 19 m, July 1900. 



Fam 9. Corallinaceae. 



J. Areschoug (1852), Corallinese in J. G. Agardh, Spec. gen. et ord. Alg. Vol. II pars 2. 

 M. FoSLiE (1891), Contribution to Knowledge of the Marine Algse of Norway. II. Tromso Museums 

 Aarshefter. 14. 



— (1895), The Norwegian Forms of Lithothamnion. D. kgl. norske Videnskabers Selsk. Skrifter. 1894. 

 Trondhjem. 



— (1898 1), Systematical Survey of the Lithothamnia. 



— (1898 II), List of Species of the Lithothamnia. Ibid. 1898, No 3. 



