OF NORTHUMBERLAND AND DURHAM. 305 



/ 



Near Berwick. — Dr. Johnston. Near Marsclen, and occa- 

 sionally among rejectamenta at Roker and Whitley. — G. S. B. — 

 N. D. 



68. CALLITHAMNION, Lyngh. 



1. C. TuRNERi, Ag. Harv. Man., p. 172. Phyc. Brit., t. 

 189. Atlas, PL LVIIL, fig. 266. Johnst. and 

 Or., vol. ii., p. 151. 

 Conf. repens. E. Bot., t. 1608, and C. Turneri, t. 

 2339. 

 Parasitic on tlie smaller Algee, chiefly on Furcellaria. Com- 

 mon. — N. D. 



2. C. ARBUscuLA, Lijiigh. Harv. Man., p. 174. Phyc. Brit., 

 t. 284. Atlas, PI. LVIL, fig. 262.- Johnst. 

 and Cr., t. 119. 

 Conf. arhuscula. E. Bot., t. 1917. 



On exposed rocks near low-water mark, and on mussels and 

 limpet shells. Near Whitburn. — Winch. Near Berwick. — Dr. 

 Johnston. Near Sealiam Harbour, on the " Bear's Back" at 

 Cullercoats, Whitley Rocks, St. Mary's Island, Newbiggen, and 

 on the " North Rocks" at Bambro'.— 6^. S. ^.— N. D. 



Dr. Harvey remarks, in the " Phycologia Britannica," that 

 he is not aware of this plant having been found in England, but 

 Mrs. Gatty informs me that it is of frequent occurrence near 

 Filey ; and it is certainly by no means rare on the coast of North- 

 umberland. Though said to grow mostly on mussel shells, I 

 have generally found C. arhuscula attached to the bare rock. It 

 is rather a coarse, shaggy plant, having little beauty except 

 under the microscope. I, on one occasion, found several plants 

 growing on limpet shells in a shallow pool near low-water mark, 

 and these specimens were much more delicate and beautiful than 

 usual, owing probably to their constant immersion. On this 

 coast Geramium acanthonotum almost constantly covers the mussel 

 patches with its dense tufts, leaving little room for any other 

 parasites. 



