OF NORTHUMBERLAND AND DURHAM. 297 



46. HELMINTHOCLADIA, Ag. 



1. H. PURPUREA, J. G. Ag. Jolmst. and Cr., t. 62. 



Nemaleon purpureum. Harv. Man., p. 153. Phyc. 

 Brit., t. 161. Atlas, PI. XLVL, fig. 210. 

 Mrs. Laws's collection contains a single specimen of this 

 plant, gathered on some part of the coast between Marsden and 

 St. Mary's Island. The exact locality not known. 



47. WORMSKIOLDIA, Spreriff. 



1. W. 8ANGUINEA, Spveng. Johnst. and Cr., t. 67. 



Delesseria sanguinea. Harv. Man., p. 114. Phyc. 



Brit., t. 151. Atlas, PI. XXXVIL, fig. 169. 

 Fucus sanguineus. E. Bot., t. 1041. 

 In deep tidal pools, and in the sea beyond low-water mark. 

 Common. — N. D. 



48. PLOCAMIUM, Laniour. 



1. P. cocciNEUM, Lyngh. Harv. Man., p. 119. Phyc. Brit., 

 t. 44. Atlas, PI. XXXIX., tig. 178. Johnst. 

 and Cr., t. 68 (A, B). 

 Fucus coccmeus. E. Bot., t. 1242. 

 On rocks and Alg^e. Very common. One of the most beau- 

 tiful of our native Alg£e, and an especial favourite with such as 

 collect sea-weeds for ornamental purposes. — N. D. 



49. RHODYMENIA, Orev. 

 1. R. PALMATA, Grev. Harv. Man., p. 127. Phyc. Brit., t. 

 217, 218. Atlas, PI. XLL, figs. 189, 190. 

 Johnst. and Cr., t. 70. 

 Fucus palmatus, &c. E. Bot., t. 1306, 2132, 2133. 

 On rocks and the stems of Laminariae. Very common and 

 very variable in character. The plants described in " English 

 Botany," under the names of Fucus palmatus, Sarniensis, and 

 sGhoUferus, are all referable to this species.— N. D. 



