OF NORTHUMBERLAND AND DURHAM. 277 



2. C. LOMENTARiA, Li/ngl). Harv. Man., p. 32. Phyc. Brit., 

 t. 285. Atlas, PI. VIII., %. 32. Jolmst. and 

 Cr., t. 153. 

 On rocks and stones between tide marks. In its young state 

 it is almost impossible to distinguish this plant from Asperococ- 

 cus echmatus, and even matured specimens of the two species 

 often resemble eacli other so closely as to make one doubt whe- 

 ther they be really distinct. — N. D. 



11. HALISERIS, Tozzetti. 

 1. H. POLYPODioiDEs, Ag. Harv. Man., p. 36. Phyc. Brit.,t. 

 19. Atlas, PI. IX., fig. 34. Johnst. and Cr., 

 t. 155. 

 Fucus merahranaceus. E. Bot., 1758. 

 " Shields beach. — Mr. Winch.''' Dr. Harvey gives this loca- 

 lity on the authority of Greville's " Alg£e BritannicEe" (p. 64). 

 The plant is not recorded in Winch's " Flora," and I am not 

 aware of its having been found by any recent collector. 



12. DICTYOTA, Zamour. 



1. D. DiCHOTOMA, Zamowr. Harv. Man., p. 39. Phyc. Brit., 1. 103. 

 Atlas, PI. X., fig. 37. Johnst. and Cr., t. 158. 

 Ulva dicliotoma, E. Bot., t. 774. 

 Among the rejectamenta of the sea at Cullercoats. — R. Foster. 



— N. 



13. DICTYOSIPHON, Grev. 



1. D. f^NicuLACEUs, Grev. Harv. Man., p. 40. Phyc. Brit., 

 t. 326. Atlas, PI. X., fig. 40. E. Bot., t. 2746. 

 Johnst. and Cr., t. 161. 

 In pools, generally above half-tide level ; on rocks, or parasitic 



on other Algee. Common. — N. D. 



14. PUNCTAEIA, Grev. 



1. P. PLANTAGiNEA, Grev. Harv. Man.,p. 41. Phyc. Brit.,t. 128. 

 Atlas, PI. XL, fig. 43. Johnst. and Cr., t. 164. 



VOL. IV., PT. IV. 2 L 



