14 MARINE KhGM OF THE ARBROATH DISTRICT. 



Iridea edulis Bory (Schizymenia edulis J. Ag.). On rocks at low 

 water, and in deep pools. Some very large specimens washed 

 ashore from deep water at West Sands. 



Catenella opuntia Grev. At the Dark Cave and Breakwater near 

 high-water mark. 



Cruoria pellita Harv. (Petrocelis cruenta J. Ag.). On rocks. 

 " Your plant has a basal layer like P. Middendorjii Ruprecht, but is 

 not in fruit," E. M. H. 



Gloiosiplionia capillaris Carm. Growing at Auchmithie, /)/•. 

 Crichton. 



Ptilota plumosa Ag. In abundance on stems of old Laminarw 

 washed ashore, occasionally growing at low- water mark ; with 

 tetrasporic fruit at Red Head. — P. sericea Gmel. Common on 

 the shaded sides of gullies and rocks at Steeple Rock, Mason's 

 Cove, Red Head, &c. 



Ceramium rubrum Ag. Common all round the coast, between 

 tide-marks. — C. botryocarpum Griff. (C. rubrum Ag., var.). In 

 summer of 1884, Dr. Crichton ? — C. Deslongchampsii Chauv. Epi- 

 phytic on other Algas, Dr. Crichton. — C. diaphanum Roth. Common 

 on Fuci and other Alga) near high water in pools. — C. acanthonotum 

 Carm. Common from below half-tide on all parts of the rocks, but 

 seems, however, to prefer the protected sides. 



Griffithsia setacea Ag. In shaded pools at Mason's Cove and 

 Deil's Head. 



Callithamnion plumuJa Lyngb. [Antithamnion plumula Thur.). 

 At the Ness and Mason's Cove in 1881, Bell. — C. Turneri Ag. 

 (Spermothamnion Turneri Aresch.). From below half-tide to low 

 water ; usually epiphytic on Ptilota sericea at the Mason's Cove and 

 Auchmithie. — C. arbuscula Lyngb. Common on mussels and rocks 

 about low-water mark. Very fine specimens at Dickmont's Den. — 

 C. Brodiai Harv. Common on rocks all round the low-water mark 

 opposite Arbroath. — C. Hookeri Ag. Generally on CUtdostephiu 

 spongiosum and on rocks at low water, Steeple Rock, and below West 

 Ropeworks. — 0. polyspermum Ag. Common at half-tide level on 

 protected sides of rocks. In Outer Harbour, opposite Signal Tower, 

 very abundant. — C. spongiosum Harv. (C. granulalum Ag.). Rare. 

 At the Red Head low- water mark. Epiphytic on smaller Algae. — 

 0. floridulum Ag. (Rhodochorton florid-ilium Nag.). Common in 

 sandy pools at the Corriens. Occasionally at the cliffs on soft 

 sandy rocks. — C. Rothii Lyngb. (Iihodochurton Piothii Nag.). Com- 

 mon on rocks near high-water mark. A small cove immediately to 

 the west of Mason's Cove is entirely lined with this plant. — C. 

 virgatulum Harv. (Clumtransia virgatula Thur.). On Polysiphonia 

 urceolata at the Red Head, on rocks below low-water mark. 



Bryopsis plumosa Ag. Rare. In pools at the Mason's Cove and 

 Auchmithie, growing on the sides in the shade. 



Cladophora rupestris Kg. Common between tide-marks, generally 

 on exposed rocks. — C. Uetevirens Harv. In pools above half-tide 

 level. Not uncommon. — 0. albida Kutz. In a pool near high- 

 water mark at Red Head. Very rare. — C. arcta Kutz. Common 

 on rocks and in pools about low water. 



