— 180 — 



Bergs. When the bipartite sporangia are present it is naturally 

 easily distinguished, but when these are wanting the lilteness is 

 considerable and 1 have been in some doubt whether it was not 

 most natural to refer our plant to this species. The reason why 

 I have not done this is, because it may be separated from Ch. 

 Hypnece not only by the bipartite sporangia but also by other 

 characters. Of these differences I may point out that the whole 

 habit of our plant is more robust. The cells are somewhat thicker 

 and on the other hand a little shorter than those of Ch. Htjpnece. 

 In Ch. bispora the cells are often a little swollen in the middle 

 while they are cylindric in Ch. Hypnece. The chromatophore is 

 more strongly developed in Cli. bispora. Finally the monosporangia 

 are slender, more cylindric than the ovate sporangia of Ch. Hypnece. 

 The plant was found growing upon Acanthophora spicifera in 

 the harbour of St. Thomas near the French wharf. It had spo- 

 rangia in December. 



Callymenia perforata J. Ag. 



J. Agardh, „Bidrag till Florideernes Systematik", p. 9; „Epi- 

 crisis", p. 219. 



Exsicc. : „Phycotheca Bor.-Amer." Nr. 287. 



Specimens of this species, first described from Ceylon, were 

 found a few times in the sea around St. Jan. From the Atlantic 

 this species is known from Florida, first found here so far I know 

 by Mrs. G.A.Hall and distributed in "Phycotheca Bor.-Am.". And 

 later on, it was found at Jupiter Inlet, Florida by Mr. M.A.Howe. 

 This species is also known from the Bermuda Isles, where Prof. 

 Farlow has gathered it. From the West Indies I do not think it 

 has been recorded earlier. 



Dr. Svedelius in Upsala has been so kind as to lend me a 

 specimen of this species from Ceylon (Ferguson, C. A. Nr. 16, from 

 Kalutara). In outer habit my specimens quite agree with the Ceylon 

 specimen and the anatomical structure also seems to be quite the 

 same in the specimens in question so far as this can be judged 

 from dried material. 



The specimens I have found were all sterile; they were dredged 

 in deep water only (ca. 15 fathoms) and found attached to other 

 algae or to stones and shells. 



This species was found in the Sound between St. Thomas 



