ry 
d 
re | 
OF NORTHUMBERLAND AND DURHAM. 
similar discrepancy, and she supposes that the prevalent heavy 
seas from the south and west have sufficed to destroy or prevent 
the growth of the more delicate red weeds, but this can scarcely 
have been the active cause on our portion of the coast—where I 
believe the sea has been by no means more than usually 
boisterous. 
Mesogloia virescens.—In extraordinary abundance amongst 
stones north of Dunstanbro’ Castle, in July; also at Roker. 
Myrionema strangulans—On Porphyra and Enteromorpha, 
north of Dunstanbro’ in July; and at Whitley rocks in Septem- 
ber. This species has not been previously observed in our 
district. 
Ectocarpus granulosus—Mr. Hodge’s collection contains a 
single specimen found on the coast near Seaham Harbour. 
Ectocarpus fasciculatus.—I gathered this near- Seaham Har- 
bour in June. It appears to be a very scarce species with us, 
though called common by most algologists. 
Myriotrichia filiformis.— Parasitic on Dictyosiphon at Dun- 
stanborough. This is not a rare plant, but I am not aware that 
it has previously been found growing on anything except Aspero- 
coccus echinatus. 
Gracilaria confervoides. —At Hartlepool in shallow pools near 
high water mark, April 27th. Some specimens were beautifully 
in fruit. 
Callithamnion Plumula.—This beautiful species was found by 
Mr. Hodge, washed up on the beach at Seaham Harbour. It 
had probably grown on the rocks at or beyond low water mark, 
and might perhaps be found 7n sctw by careful search. 
Callithamnion brachiatum.—Two ‘specimens were found at 
Dunstanbro’ in July; growing on the stem of Laminaria. 
Oscillatoria littoralis—This species was included in the cata- 
logue, but I was unable to give the precise locality. I have this 
year found it abundantly in salt marshes at Warkworth and 
Hylton on the Wear. 
Vaucheria velutina.—In salt marshes at Warkworth. 
Ulva bullosa.—In ditches of brackish water at Hartlepool. 
