12 MARINE ALG.E OF THE ARBROATH DISTRICT. 



Gaylet pot, at high-water mark. — 8. cirrhosa Ag. Common, gene- 

 rally on other Alga3. At the Mason's Cove, Delesseria sanguined is 

 always more or less infested. — S. radicans Harvey. At the Mason's 

 Cove, common ; and Corriens, not uncommon. On the sides of 

 Fuci-covered sand-rock, and in shallow pools about low water. — 

 Var. olivacea Batters. In caves, forming matted tufts. 



Ectocarpus siliculosus Lyngb. (E. confer roides Le Jolis). Abun- 

 dant on Fuci between tide-marks. — E. fasciculatus Harvey. On the 

 edges of the fronds of Laminarue at the Ness and Floors Bay. — E. 

 tomentosits Lyngb. Very abundant at different parts of the cliffs, 

 old thongs of Himanthalia lorea being clothed with a dense ropy 

 mass, giving a bottle-brush appearance to it ; also found on the 

 Fuci. — E. littoralis Lyngb. (Pylaiella littoralis Kjellm.). Common 

 in all tide-pools on Fuci. Inside of breakwater, on muddy rocks, 

 found with unilocular sporangia. — E. granulosus Ag. Found once 

 below Signal Tower, in a half-tide pool. — E. spharophorus Carm. 

 (Isthmoplea sphasrophora Kjellm.). In a deep gully at the Steeple 

 Rock, on Ptilota sericea ; and at Auchmithie, on Polysiphonia 

 nigresens. Rare. 



Ascocyclus balticus Reinke. On Laminaria at Mason's Cove. 



Myriotrichia clavaformis Harv. On Polysiphonia nigrescent, in a 

 pool beyond the Ness, at high-water mark. — M.jiliformis Harvey. 

 Growing in the same pool as the preceding, and epiphytic on the 

 same plant. 



Odonthalia dentata Lyngb. Plentiful at the Cliffs; large speci- 

 mens more than a foot long washed ashore from deep water. 



Wwdomela lycopodioides Ag. In pools to west and east of 

 Harbour, at extreme low water ; epiphytic. Rare. — E. subjnsca 

 Ag. Common at low-water mark in pools below Arbroath. 



Polysiphonia urceolata Grev. Abundant on Laminaria digitata, 

 aud on rocks at low water. At the Red Head it grows very abun- 

 dantly on a rock connecting the Old Red Sandstone and Basaltic, 

 the plants forming tufts ten inches long. — P.Jibrata Harv. At 

 Whiting Ness, on exposed rocks. — /'. eUmgata Grev. Below East 

 Links, and washed ashore at West Sands from deep water. Rare. 

 — P. Brodicd Grev. Common on rocks and pools from below half- 

 tide. — P. nigrescens Grev. Plentiful everywhere. — P. atrorubescens 

 Grev. In a sandy pool on the Harbour Bar, and Mason's Cove. — 

 P. fastigiata Grev. Plentiful on Fucus nodosus. — P. parasitica Grev. 

 On Laminaria digitata from Bell Rock, and in rock-pools at the 

 Mason's Cove. — P. bgssoides Grev. Cast ashore in abundance at 

 the West Sands. 



Laurencia pinnaUfida Lamour. Common at low-water mark. — 

 L. ccespitosa Lamour. (L. hybrida Lenorin.). Common in rock-pools 

 near high-water mark. 



Chrysymenia clavellosa J. Ag. {Chylocladia clavellosa Grev.). 

 Washed ashore in abundance ; found growing at Deil's Head at 

 extreme low water. 



Chylocladia articulata Grev. [Lomentaria articulata Lyngb.). 

 Abundant in gullies and shaded sides of rocks. 



Peyssonnelia Dubyi. On Laminaria stems, with tetraspores, in 

 November. 



