much attenuated upwards, nor are the. ultimate divisions drawn out into 

 slender fibres, but end in a short, obtuse point. They are single-tubed, the 

 articulations about thrice or four times as long as broad, but varying in 

 length in different specimens. The ceramidia have not yet been discovered. 

 The stichidia are lanceolate, acuminate, and sometimes ending in a hair-like 

 point, and are borne on the ramelli; they contain tetraspores set in a 

 double row. The colour, when growing, is a full, deep blood-red, becoming 

 brighter in fresh water. The substance is soft, but not gelatinous, and the 

 plant adheres firmly to paper in drying. 



The genus Basya is particularly rich in species on the Austra- 

 lian coast, and many beautiful species of it have already been 

 figured, with more or less detail, in the Author's ' Nereis Aus- 

 tralis.' Many others of recent discovery remain, which it is 

 proposed to figure in the present work. Of these the present 

 delicate species is one ; and this I have elsewhere inscribed to 

 its indefatigable discoverer, George Clifton, Esq., of Fremantle, 

 Western Australia, to whom I am indebted for many hundred 

 well-dried specimens of the Algae of Western Australia, and who 

 has already added several new ones to our previous list, and 

 from whom much is still to be expected. 



The present species was one of his earliest discoveries, and was 

 named by me in commemoration of a pleasant day's dredging off 

 Fremantle, when we first fished up this and several other beauti- 

 ful forms, both animal and vegetable. I afterwards obtained it 

 in quantity, both at Rottnest and King George's Sound. It is 

 nearly allied to D. elongata, Sond., but is a much more slender 

 plant, almost always occurring in dense tufts ; and its stems are 

 either wavy and zigzag, or spirally twisted round each other or 

 round neighbouring objects. These characters, with its brighter 

 colour and softer substance, sufficientlv distinguish it. 



The ceramidia, when found, may perhaps afford an additional 

 distinction. 



Fig. 1. Dasya Cliftoni, — the natural size. 2. A pinnule clothed with ramelli. 

 3. A ramcllus. 4. Stichidia : — the latter figures more or less magnified. 



