195 



Callithamnion gracitlimum. Milford Haven. 



thuyoides. Ilfracombe ; Bracelet Bay, near Swansea. 



spongiosum. Cawsand Bay, near Plymouth ; Land's End ; Holyhead. 



pedicellatum, Salcombe ; Mount's Bay ; Milford Haven. 



barbatum. Plymouth. 



Pluma. Torbay. 



ChcBtophora pellita. Land's End ; Mount's Bay. 



Conferva pellucida and diffusa. Aberffraw and Holyhead abundant. 



refracta and glaucescens. Mount's Bay. 



Mougeotia ccei-ulescens. In several places about Penzance. 

 Codium adherens, (perennial). Sennen cove, Land's End. 

 Bryopsis hypnoides, (Eng. Bot. t. 2781). Ilfracombe. 

 Vaucheria velutina. Near Holyhead. 



clavata. Pilton, Devonshire ; Mrs. Griffiths. Specimens much taller and 



more diffuse than the figure in the ' Gleanings,' but Mr. Berkeley considers that 

 it belongs to this species. 



Rivularia plicata. Salcombe ; Ilfracombe ; Barmouth. 



nitida. Cawsand Bay, near Plymouth ; Mount's Bay. 



Scytonema turfacea, (Berkeley in Eng. Bot.' t. 2826). Sussex, Mr. Borrer. 

 Calothrix interrupta. Machynlleth, North Wales. 



Lyngbya majuscula. Ilfracombe ; Plymouth ; Mount's Bay ; Anglesea, near the Me- 

 nai Bridge. 



ferruginea. Sussex ; Mr. Borrer. Near Holyhead. 



Carmichaelii. Mount's Bay. 



■ speciosa. Mount's Bay. 



Oscillatoria Friesii. Many places in North Wales. 



cyanea. Towednack Chm'ch, near St. Ives ; the Rev. H. Penneck. 



Ulva calophylla. Oswestiy, Shropshire ; Rev. T. Salwey. Aberdeen ; Mr. Dickie. 

 Llanberris ; Capel Cerrig and Dolgelly, North Wales. 



Bangia LaminaricB. Scilly Islands ; Miss M. Wliite. Moimt's Bay. 



Palmella Ralfsii. Cwm Bychan, Snowdon, Glyder &c., North Wales. 



Hydrurus Ducluzelii, River Ogwen near Bangor. I am not certain about the species ; 

 I had no microscope with me, and neglected to preserve specimens : it was not 

 half the size of the Devonshire plant. 



Nostoc sphcericum. Llyn Coron, Anglesea, near Caernarvon. 



Anabaina Jacobi, {Sphterozyga Jacobi, Berk, in Eng. Bot. t. 2826, fig. 2). Northamp- 

 tonshire ; Rev. M. J. Berkeley. Swansea ? not certain about the species. 



Eutomia rotata. Penzance ; Swansea ; many places in North Wales. 



oblonga. Penzance ; Caernarvon. 



Chroolepus Arnottii. On the root of a yew, Penn's Rocks, Tonbridge Wells ; Mr. 



Borrer. 

 Meloseira varians. Sussex ; Mr. BoiTer, who is of opinion that it is not uncommon. 



Penzance ; Tavistock ; Dolgelly. 

 Desmidium Swartzii. Penzance; Swansea; Dolgelly; Caernarvon. 

 Fragilaria aurea. Mount's Bay. 



diatomoides. St. Michael's Mount ; Land's End. 



hjemalis, Lyngb. Tavistock, Devonshire; and Dolgelly, North Wales; 



near Barmouth ; Rev. T. Salwey. 



