TORRES STRAITS AND AKASHI CHANNEL. 449 



structure is that of Hymenocladia, the whole tissue infested with 

 the mycelium of a mould, and the entire surface incrusted with 

 a thin sponge which, Mr. Carter informs me, " belongs to the 

 Holoraphidota, Family Suberitida, Group Cavernosa, and very 

 much resembling Cliona celata." 



The specimens were adherent to ILalimeda macroloba. 



Siphon ace^:. 

 Caulerpa cupressoidbs, Vahl. 



C. plumaris, Forsk. 

 C. simpliuscula, Ag. 



C. VERTICILLATA, J. Ag . 



C. cylindbacea, Sonder. 



Halimeda incrassata, hams* 



H. macroloba, Due. 



H. cuneata, Hering. 

 Udotea pl a bell at a, Lamx. 



A single specimen which I refer to this species. 

 codium tomentosum, ag. 



Yaloniacejs. 



Dityosph^eria favl'losa, Sander. 



(2) AlgcB collected in Akasld Channel near Kobe (Mioffo) Nipon, 

 Japan, in 4 to 6 fathoms, the bottom consisting of granite pebbles. 



FlfOACEJB. 



Sargassum pixnath olium, Ag. 



S. OBTUSIFQLIUM, Ag. ? 



One imperfect specimen. 



Dicti'otacej:. 



Punctaria latifolia, Grev.1 



Several examples, much torn and without the point of attach- 

 ment, may be referred with some doubt to this species. They 

 have the same structure, but are more luxuriant than British spe- 



cimens. 



Chordakiaceje 



Chorda filum, Lamx. 

 Attached to small stones. 



