4 THE VOYAGE OF H.M.S. CHALLENGER. 



" On some of the specimens I found the propagula abundant, and evidently mature ; 

 in form and size I can see no essential difference between them and those of Ectocarpas 

 simjjliciuscidus, K. A. Agardh." — Dickie. 



San Auo-ustin, on the Pacific coast of Mexico, is the only other locality recorded for 

 this species. 



RHODOSPERME^E. 



CoRALLINACE^E. 



Lithothamnion polymorphism, Linn. 



Liiholhamnion polymorphum, Linn. ; J. G. Agardh, Sp. Alg., ii. p. 524 ; Dickie in Journ. Linn. Soc. 



Lond., xiv. p. 356. 

 Mdobesia polymorpha, Harv., Nereis Austr., p. 110. 



St Paul's Eocks. Moseley. 



Abundant, forming a distinct band along the rocks ; the Cfmoospora at a rather 

 hicfher level. 1 



Atlantic and Mediterranean shores ; South Africa ; Chonos Archipelago. 



Melobesia lichenoides, Ktitz. 



Mdobesia lichenoides, Kiitz., Sp. Alg., p. 697 ; Dickie in Journ. Linn. Soc. Lond., xiv. p. 357. 



St Paul's Eocks. Moseley. 



Sparingly with the Delesseria and Nitophyllum. 



Shores of Britain and France ; various parts of Mediterranean ; Norfolk Island ; 

 Southern Ocean. 



Sph <EROCOCCOIDE,£. 



Delesseria spathulata, Sonder 1 



Delesseria spathulata, Sonder? Dickie in Journ. Linn. Soc. Lond., xiv. p. 357. 



St Paul's Eocks. Moseley. 



" Only two or three imperfect specimens mixed with the Nitophyllum ; half an inch 

 long by about a line in breadth. I could see no fruit, and can only judge from outline, 

 venation, and general arrangement of the cells that it may be a form of Sonder's plant." — 

 Dickie. 



East coast of Australia. 



" dost of the specimens were drilled throughout by various organisms. A few fragments were sent to 

 Dr M'lnto b of Murthly, and Mr Jeffreys. They report the presence of sponge, a mollusk allied to Vennetus, 

 Stoa, and Spiroglyphus, and annelids belonging to the genera Dodecacaria and Sabella." — Dickie. 



