OF NORTHUMBERLAND AND DURHAM. 271 



I regret that I am unable to confirm tlie existence of this 

 species in our district. I have had no opportunity of examining 

 the specimens found by Mr. Weighell and Mr. Eobson, and I 

 can scarcely avoid the suspicion that some other plant must 

 have been erroneously taken for C. ericoides, which is a strictly 

 southern species. 



4. FUCUS, Lyngb, 



1. F. VEsicuLOsus, Lyngh. Harv. Man., p. 18. Phyc. Brit., 



t. 204. Atlas, PI. III., fig. 10. E. Bot., t. 

 1066 and 1685. Johnst. and Cr., t. 136. 

 On rocks and stones between tide marks ; very abundant, and 

 very variable in appearance. — N. D. 



2. F. CERANoiDEs, Lyiigb. Harv. Man., p. 19. Phyc. Brit., t. 



271. Atlas, PL III., fig. 11. E. Bot., t. 2115. 



Johnst. and Cr., t. 137. 



" Abundant on the sides of the Tweed from the bridge to its 



mouth." — Br. Johnston. In the cave at Cullercoats. — R. 



Foster. Plentiful at the mouth of the Wear. — E. Backhouse. 



^N. D. 



3. F. SERRATUS, Lyngh. Harv. Man., p. 19. Phyc. Brit,, t. 



47. Atlas, PI. III., fig 12. E. Bot., t. 1221. 

 Johnst. and Cr., t. 138. 

 On rocky shores. Exceedingly common. — N. D. 



4. F. NODOSUS, Lyngh. Harv. Man., p. 19. Phyc. Brit., t. 



158. Atlas, PI. IV., fig. 13. E. Bot., t. 570. 

 Johnst. and Cr., t. 139. 

 On rocks between tide marks. Very common. — N. D. 



5. F. cANALicuLATus, Z?/??^/^. Harv. Man., p. 20. Phyc. Brit., 



t. 229. Atlas, PL IV., fig. 15. E. Bot., t. 823. 

 Johnst. and Cr., t. 140. 

 On rocks and stones near high-water mark. Common.— N. D, 



