154 



Remark on the synonomy. Those of the above quoted sy- 

 nonymes of which I have seen specimens accord with L. Lenor- 

 mandi in the sense here taken. As mentioned under L. Stromfeltii 

 I suppose M. Lenormandi F a r 1. includes the former, but not 

 unlikely f. sublcevis and perhaps also f. typica of the present spe- 

 cies. As to my L. Lenormandi in Contrib. 1 cp. under L. 

 Stromfeltii. 



A specimen from the Black Sea determined by Mr. C. Decken- 

 bach as L. Lenormandi seems also to me to be referrible to 

 this species, but the numerous and densely crowded conceptacles 

 are emptied, only a border left, and they are smaller than frequently 

 in L. Lenormandi, about 200 /j. in diameter, partly a little more 

 partly even less. However, I have not examined the structure, 

 the colour is much faded, apparently having been kept in alcohol, 

 and not unlikely it ought to be considered a denominated form 

 of the species. 



Relation to other species. I do not know any other species 

 of the subgenus Lithophyllum to which the present plant shows 

 greater affinity than L. tenue (Kj ell m.), a species that I, however, 

 have not seen. Cp. Beringh. Algfl. p. 22, t. 1, fig. 6 — 10. With 

 reference to its relation to L. Stromfeltii cp. under the latter. 



Habitat. Along the northern coast it appears frequently to 

 occur in rock pools or on rocks in the lower part of the literal 

 region, partly in sheltered places partly on open coast. On the 

 southern coast it sometimes descends a little into the sublitoral 

 region. In East-Finmarken specimens with reproductive organs 

 have been taken in the beginning of July, in Nordland in June, 

 July, August and October, and in the Christiania Fjord in December. 

 Most of the conceptacles were, however, recently emptied in the 

 specimens that I have seen. At Helgoland it bears these organs 

 in March and June, on the British coast in January, February and 

 March, and at Cherbourg in February. Thus it seems as if the 

 plant at least in southern waters develops such organs all the year. 



Occurrence. This is a more southern plant than L. Stromfeltii. 

 I know but little of its distribution with us, as it has often been 

 confounded with other species. The most northern place from 



