186 



Callithamnion lanuginosum. By the Mumbles light-house. 



Batrachospermum moniliforme. In a small brook that runs to the upper end of Cline 

 Wood, and other clear streams, (Dillwyn). 



Bullochcete setigera. Found by Mr. W. W. Young, in a rivulet near Cadoxton, (Dill). 



Draparnaldia glomerata. In a small stream which crosses the Gower road, on Cline 

 Common. Conferva mutabilis of the 'British Confervse' is different, and is ge- 

 nerally a much more common species, (Dillwyn). 



— — tenuis. In rivulets and springs, growing on various substances, and I 



rather doubt whether it belongs to this genus, (Dillwyn). 



Chcetophora endivitBfolia. Cromlyn Bog, near the first bridge on the right hand side 

 going to Neath. 



Conferva fontinalis. In a small piece of new garden-ground on the road to Mumbles, 

 formerly waste land. 



vesicata, (alteruata, Dillw.) In a rivulet near Swansea, (Dillwyn). 



tripartita. In ditches between Pontardulais and the sea, and it may possi- 

 bly be a variety of Conf. rivularis, (Dillwyn). 



dissiliens. On aquatic plants in ditches on Cromlyn Bog, (Dillwyn). 



tortuosa. Rocks in the sea on the coast of Gower. 



implexa. By the Mumbles light-house. 



melagonium. In almost all the pools near low-water mark by the Mumbles 



light-house and Bracelet Bay, but seldom more than a few threads in a pool. 



— <Brea. Pools near high-water mark, at Mumbles and by Salt-house Point. 



— fiacca. In the sea, parasitical on other Algae, (Dillwyn). 



— fucicola. By the Mumbles light-house. 



— Jlaccida. On Halidrys siliquosa, in a pool near the Mumbles light-house ; 

 found by Mr. Ralfs, who had never before seen it except on Cystoseira. 



— curta. In the sea, parasitical on Fuci, not uncommon, (Dillwyn). 



— carnea. On marine Confervae in the river near Loughor, (Dillwyn). 

 crispata. Found by Mr. W. W. Young, in pools and ditches near Newton 



Nottage, (Dillwyn). 



— pellucida. Found among rejectamenta of the sea in Caswell Bay. 



— diffusa. On rocks in the sea, (Dillwyn). 



— rupestris. Mumbles. 



— IcBtevirens. Common on rocks in the sea, and I believe it to be quite distinct 

 from Conferva glomerata, (Dillwyn). 



lanosa. By Mumbles light-house. 



Sphceroplea punctali&. In a pool on the moor north of Cefn Bryn, where, soon after 

 my work on the British Confervse went to press, I first found it with the fila- 

 ments conjugated, (Dillwyn). 



Codium tomentosum. Among the rejectamenta of the sea, rare, (Dillwyn). 



JBryopsis plumosa. Near Mumbles light-house, in Bracelet Bay. 



Vaucheria multicapsularis. Common on clayey banks in high and exposed situations 

 throughout the neighbourhood. 



Stigonema atro-virens. On wet rocks which form the banks of the river above the fall 

 at Aberdylais, and other similar situations. 



Scytonema myochrous. In a mountain torrent near Pont Nedd Vechn. I cannot but 

 think it has much aflinity with this genus, and have a note that it belongs, as 



