(110) 



The filaments of the periphery are more slender, the joints rather longer 

 in proportion to their breadth, the apical joint very large and capitate ; 

 the branches are very patent, and covered with an abundance of very 

 slender confervoid filaments. 



There is something curious in the history of this species. It seems 

 to have been unknown except as an inhabitant of the Baltic, until dis- 

 covered on the shores of Belfast Lough, by Mr. M'Calla, who found it 

 thrown up apparently from deep water, and scattered in abundance along 

 the shore for miles. Since then it has been found floating in Plymouth 

 Harbour by Mr. F. Pascoe, but we are not informed in what quantity, 

 and have not heard of its occurrence elsewhere, or of its being again 

 observed in these localities. Beyond some imperfect Irish specimens, we 

 have not met with the plant, but have repeatedly received slender 

 branched varieties of the preceding doubtfully referred to the present. 

 From that it may readily be known by its numerous, very patent, 

 irregularly dichotomous branches. 



mm: 



4 



CHORDAMA DIVARICATA. 



EXPLANATION OF DISSECTIONS. 



Fig. 1. — Transverse section of frond. 

 2. — Longitudinal section of same. 

 3. — Filaments of the periphery. 

 4. — Spores. All magnified. 



