OF NORTHUMBERLAND AND DURHAM. 285 



Iiam Harbour, Ryhope, Hendon, Marsden, Cullcrcoats, Whitley 

 rocks, Hartley, &c. — G. S. B. 



According to Dr. Harvey this species is generally parasitic on 

 Ptilota sericea and Cladopliora rupestris. I have only twice 

 observed it on the latter, and never on the former of those plants, 

 but chiefly on Callithamnion polyspermum, C. arbusculaj and Poly- 

 siphoma nigrescens. — N. D. 



8. E. Mertensii, Ag. Harv. Man., p. 62. Phyc. Brit.,t. 132. 



Atlas, PL XXII., fig. 96. Johnst. and Cr., t. 



182. 

 " On rocks near Seaton (Durham). — Mr. BackJiouse.'^ — Winch, 

 — D. 



Mrs. Laws's collection contains a specimen of this plant from 

 our coast, probably from the south of Northumberland. It is 

 generally distributed on the British coast, but is never, I believe, 

 found very abundantly. I have not myself met with it in this 

 district. 



26. MYRIOTRICHIA, Harv. 

 1. M. PiLiFORMis, Ilarv. Harv. Man., p. 63. Phyc. Brit., 

 t. 156. Atlas, PI. XXII., fig. 98. Johnst. and 

 Cr., vol. iii., p. 199. 

 Parasitic on Asperococcus ecliinatus. CuUercoats, St. Mary's 

 Island, and Holy Island.— 6^. S. B. — N. 



khodospeemej:. 



27. ODONTHALIA, Lyngh. 



1. 0. DENTATA, Lyngh. Harv. Man., p. 78. Phyc. Brit.,t. 34. 

 Atlas, PI. XXIII., fig. 99. Johnst. and Cr., t. 1. 

 Fucus dentatus. E. Bot., t. 1241. 

 On rocks in the sea. Rare. Holy Island, North Sunder- 

 land, and St. Mary's Island. — G. S. B. CuUercoats, and among 



VOL. IV., PT. IV. 2 M 



