96 Proceedings of the Royal Physical Society. 



V. Additional Notes on the Algce of the Firth of Forth. 

 By George William Traill, Esq. 



(Read 19th January 1881.) 



List of species new to the Firth of Forth, discovered during 

 the year 1880. 



1. Ulothrix flacca. — Joppa, and Caroline Park, on rocks and 



fuci. 



2. RMzoclonium rochianum. — Earlsferry, on iron-work. 



3. Calothrix semiplena, Harvey (Symploca harveyi, Le Jolis). 



— Kincraig, in pools at high water, and on ex- 

 posed rocks in the district, not uncommon. 



4. Chcetomorpha arenosa. — Earlsferry, in pools at high water. 



5. Lynghya cestuarii. — Do., do., rare. 



6. Lynghya luteo-fusca. — Do., do. 



6^. Oscillatoria suhidiformis. — Accompanying Leptothrix 

 radians in the Devil's Cave, near Earlsferry. 



7. Enteromorpha p^ercursa. — Earlsferry, in pools at high 



water. 



8. Bangia ciliaris. — Joppa, on small algse at very low tides. 



9. Prasiola marina. — Joppa, Granton, Caroline Park, etc., 



on rocks, boulders, and wood-work, near high 



water mark. 

 10. Myrionema strangulans. — Earlsferry, on E. compressa. 

 *11. Dictyosiphon fmnicnlaceus, sub-species hispidus of Kjell- 



man. — Joppa, parasitical on small algse in pools 



at about half tide. 

 *12. Dictyosiphon hippuroides, Areschoug. — Very fine at Dun- 

 bar ; also at Earlsferry, in pools, from half tide 



to low water. 

 *13. Dictyosiphon mesogloia, Ag. — Earlsferry, in pools at half 



tide. 



14. Ectocarpus crinitus. — At Joppa and Caroline Park, on 



muddy rocks. 



15. Ectocarjms fascicidattcs. — Earlsferry, on Lam. sacchariTia. 



16. Ectocarpus secundus. — Joppa, on Lam. fascia, rare; also on 



limpet shells, in pools, at Chapelness, Earlsferry. 



* Those with an asterisk are new to Britain. 



