290 CATALOGUE OF THE MARINE ALG.E 



Conf. hyssoides. E. Bot., t. 547. 



"Washed up by the sea, generally in August and September. 

 Occurring rather sparingly all along the coast, but very fine and 

 abundant between Cullercoats and St. Mary's Island. A very 

 beautiful plant when seen in the water, but one which loses 

 much of its delicacy, both of form and colour, in drying. — N. D. 



[I omit from my list of this genus two plants which Mr. 

 Winch records in his " Flora" — P. stricta and P. sjnnulosa. 

 Under the first of these names he very probably included speci- 

 mens which ought to be referred to P. formosa or P. urceolata. 

 The original P. stricta of Dillwyn seems to be absorbed into 

 other species. Dr. Harvey says it is " a very ill-defined, con- 

 fused species, which I do not understand, nor can it be deter- 

 mined without a careful examination of the original specimens 

 figured by Dillwyn. In herbaria we sometimes find P. formosa^ 

 sometimes P. fihrata under this name." The other plant, P. 

 sj)inulosa, Mr. Winch mentions as having been found among the 

 rejectamenta of the sea at Whitburn. Dr. Harvey gives only 

 one locality for this species, which was gathered by Capt. Car- 

 michael at Appin, and he only found one specimen, now pre- 

 served in the Hookerian Herbarium. As there is considerable 

 similarity in external appearance (though not in structure) be- 

 tween this and some other species, it seems safer, in the absence 

 of Whitburn specimens, to omit it altogether.] 



31. DASYA, Ag. 



1. D. cocciNEA, Ag. Harv. Man., p. 93. Phyc. Brit., t. 253. 

 Atlas, PI. XXX., fig. 135. Johnst. and Or., 

 t. 26. 

 Conf. coccinea. E. Bot., t. 1055. 

 On rocks, &c., near low-water mark. I have never found this 

 plant growing, and suppose that it is out of reach at ordinary 

 tides. It is, however, often to be met with among rejectamenta. 

 My finest specimens have all been gathered on the beach south 

 of St. Mary's Island.— N. D. 



