182 THE VOYAGE OF H.M.S. CHALLENGEE. 



EcTOCARPACE^E. 



Sphacelaria paniculata, Suhr. 



Sphacelaria paniculata, Suhr; J. G. Agardh, Sp. Alg., i. p. 36; Dickie in Journ. Linn. Soc. Lond., 



xiv. p. 384. 

 Stypocaulon paniculatum, Kiitz., Sp. Alg., p. 467. 



Tristan da Cunha. Moseley. 



Common on the coast of New Zealand and Australia, and also found in Southern Chili. 



RHODOSPERMELE. 



Khodomelace^e. 

 Dasya obscura, Dickie. 



Dasya obscura, Dickie, n. sp., in Journ. Linn. Soc. Lond., xiv. p. 384. 



Fronde, rarnis rarnulique densis, subspongiosa, pinnatim ramosa, ramis alternis ; rhachi 

 polysiphonia, sursum longius corticata ; ramulis densissime dichotomis obtusis ; stichidiis 

 lanceolatis breviter pedunculatis. 



Tristan da Cunha. — Endemic. Moseley. 



Only one specimen two to three inches long. 



CORALLINACE^E. 



Arthrocardia corymbosa, J. G. Agardh. 



Arthrocardia corymbosa, J. G. Agardh, Sp. Alg., ii. p. 550; Dickie in Journ. Linn. Soc. Lond., xiv. 



p. 386. 

 Corattina corymbosa, Lamark in Mem. Mus. Par., ii. p. 234. 

 Amphiroa corymbosa, Dene, in Ann. Sc. Nat., ser. 2, xviii. p. 124; Harv., Nereis Austr., p. 99, 



t. 38; Kiitz., Sp. Alg., p. 703. 



Inaccessible Island. Moseley. 



Cape of Good Hope ; New Zealand. 



Kutzing, loc. cit, by mistake, probably, cites " ad oras Americse" for this species. 



Sph^rococcoide^:. 



Nitophyllum undulaturn, Kiitz. 



Nitophyllum undvlatum, Kiitz. ; Dickie in Journ. Linn. Soc. Lond., xiv. p. 385. 



Tristan da Cunha. Moseley. 

 Cape of Good Hope. 



Mr Moseley's specimens are not in very good condition, and they are very dwarfed, 

 yet they have both coccidia and tetraspores, and seem to belong to the species mentioned. 



