OF NORTHUMBERLAND AND DURHAM. 283 



In a very small and shaded rock basin north of Seaham har- 

 bour.— (?. S. B.—B. 



The shores of Wales and two localities on the south 

 coast of England are, I believe, the only recorded habitats 

 for this plant. It is one, however, which may easily be 

 overlooked, and will probably be detected on other parts of the 

 coast. Mrs. Gatty finds it in the Isle of Man. My specimens 

 agree pretty closely with Dr. Harvey's description, but in only 

 few of the filaments are the transverse bands discernible. The 

 branching is excessively irregular, some filaments producing 

 several short, strongly adpressed clavate ramuli, which are often 

 trifid, others giving off long simple branches. The spores are 

 globose and stalked. The plant was found growing on the rock, 

 whereas S. cirrhosa, with which it has a near affinity, is, I think, 

 invariably parasitic. 



6. S. RADicANs, Harv. Harv. Man., p. 57. Phyc. Brit., t. 189. 

 Atlas, PI. XVIII., fig. 79. Johnst. and Cr., vol. 

 iii., p. 161. 

 Conferva radicans. E. Bot., t. 2138. 

 Frequent on many parts of the coast, spreading in irregular 

 patches over the surface of sand-covered rocks between tide 

 marks. — N. D. 



25. ECTOCARPUS, Lyngh. 



1. E. siLicuLOSUS, Lyngh. Harv Man., p. 58. Phyc. Brit., t. 



162. Atlas, PI. XIX., fig. 81. Johnst. and 

 Cr., 1. 174. 

 Conferva siliculosa. E. Bot., t. 2319. 

 Between tide marks, on Alg^e and Corallines. Not very com- 

 mon, but occurring all along the coast. — N. D. 



2. E. FENESTRATUs, Berh. Harv. Man., p. 58. Phyc. Brit., t. 



257. Atlas, PI. XX., fig. 86. Johnst. and Cr., 

 vol. iii., p. 169. 

 On sand-covered rocks near Whitley. Amongst Laminaria 

 fascia and Chorda lomentaria. — May, 1860. — G. S. B. — N. 



