No. 7] REMARKS ON MELOBESLE IN HERBARIUM GROUAN 9 



remarked by Rosanoff himself, and so also in L. corticiforme. 

 A great number of cells in the latter are found to be of the same 

 shape and size as in M. rosea. The said specimen is provided 

 with a few young conceptacles which scarcely may be separated 

 from young conceptacles in L. corticiforme. It certainly needs 

 closer examination but it appears, on the other hand, to be but 

 little doLibt as regards the identity. 



The species described as Melohesia incequilaterata Solms, 

 Corall. Alonogr. p. 12, t. III, f. 13 — 18 1 should be much inclined 

 also to consider identic either with L. corticiforme or perhaps more 

 probably M. farinosa. It has been found on Hydroids in the Gulf 

 or Naples, but only quite young specimens are knovvn, and such 

 are always extremely difficult to identity with certainty in this 

 group of algæ. I have not seen any specimen, nor do I know 

 the size of the cells. 



So also \\'ith reference to Lithocystis Allmanni Harv. Phyc. 

 Brit. pl. 166, and HajKtlidium confervoicles Batt. Mar. Alg. Ber- 

 wick, p. 136, probably being identic with L. corticiforme. Nor 

 have 1 seen any specimen of these. The latter has according to 

 Batters 1. c. been found on Chyloclaclia rosea, Nithophyllum 

 punctatum, and other algæ „washed ashore from deep water". 

 L. corticiforme lives under the same conditions, although apparently 

 not in any great depth, and I have seen certain specim.ens of it 

 on Rhodymenia pcdmata, Furcellaria fastigiata, Phyllophora ru- 

 bens, CJiondrus crispus, Laurencia ohtusa (the latter from the south 

 coast of Norway), and Gelidium corneum. 



Hapalidium Hildenbrandtioides Crn. 



Fl. Finist. p. 14^. 



=^ Lithothamnion (Epilithon) corticiforme (Ktilz.) Fosl. 



In herb. Mus. d''hist. natur, in Paris is to be found a well 

 developed, authentic specimen attached to Rhodymenia palmata, 

 and furnished with numerous conceptacles of sporangia. It 

 eides in every respect with typical L. corticiforme. 



