BOTANY 



FRESHWATER ALGM. 



The freshwater algae of Kent have never been carefully worked out, except in the im- 

 mediate neighbourhood of Tunbridge Wells. The most complete list that has been pub- 

 lished is that given in Jenner's Flora of Tunbridge Wells. To this list is now added a number 

 of species collected by the writer in the neighbourhood of Sevenoaks, and some diatoms col- 

 lected by the late Dr. E. Capron at Northfleet and Folkestone. But there are many localities 

 in Kent that would probably yield a large number of species not yet detected in the county, 

 such as the marsh ditches near the estuaries of the Thames and Medway, and those around 

 Minster and Grove Ferry, and on the coast near Deal and Reculver. Others would 

 unquestionably be found in the ponds scattered throughout the county. The following 

 list must therefore not be regarded as a fully representative one. 



CYANOPHYCE^ 

 Chroococcace^ 



Glaeocapsa arenaria, Rabenh. 



Tunbridge Wells 

 Merismopsdia punctata, 



Meyen. Tunbridge Wells 



OSCILLATORIACE^ 



Arthrospira Jenneri, Stiz. 



Tonbridge 

 Lyngbya vermicularis, Hass. 



Rusthall Common. 

 Oscillatoria nigra, Vauch. 



Sevenoaks 



— tenuis, C. Ag. Tunbridge 



Wells 



— terebriformis, C. Ag. Tun- 



bridge Wells 

 Phormidium autumnale, Gom. 

 Tunbridge Wells 



RlVULARIACE^ 



Rivularia haematites, C. Ag. 

 Riverhead 



NoSTOCACEjE 



Anabsena spiralis, Thomps. 



Tunbridge Wells 

 Nostoc commune, Vauch. 



Kemsing, Westerham 



BACILLARIACE^ 



Naviculaceje 



Amphipleura pellucida, Kiitz. 

 Shoreham, Tunbridge Wells 



Navicula viridis, Kiitz. Tun- 

 bridge Wells 



Pleurosigma Hippocampus, 

 W. Sm. Shoreham 



Scoliopleura Westii, Grun. 

 Northfleet 



CyMBELLACEjE 



Cymbella Cistula, Hempr. 

 Westerham 



— lanceolatum, Ehr. Shore- 



ham 

 Encyonema prostratum, Ralfs. 

 Sandhurst 



GoMPHONEMACE^ 



Gomphonema acuminatum, 

 Ehr. Tunbridge Wells 



— augur, Ehr. Shoreham 



— constrictum, Ehr. Sfeld- 



hurst, Shoreham 



— exiguum, Kiitz. Westerhav 



Achnanthace;e 



Achnanthes minutissima, Kiitz. 

 Westerham, Shoreham, 



Sevenoaks 



NlTZSCHIACE^ 



Nitzschia acuminata, Grun. 

 Tilbury 



— circumsuta, Grun. North- 



fleet 



— navicularis, Grun. North- 



fleet 



— sigmoidea, W. Sm. Otford, 



Shoreham 



SURIRELLACE* 



Suriraya biseriata, Breb. North- 

 fleet 



— striatula, Turp. Otford, 



Shoreham 

 Campylodiscus bicostatus, W. 

 Sm. Northfleet 



— echeneis, Ehr. Folkestone 



— Thuretii, Breb. Folkestone 



DlATOMACE^ 



Diatoma elongatum, C. Ag. 

 Tunbridge Wells 



— vulgare, Bory. Otford, 



Shoreham,Tunbridge Wells, 

 Sevenoaks 



MeRIDIONACEjE 



Meridion circulare, Ralfs. 

 Shoreham, Tunbridge 



Wells 



— constrictum, Ralfs. Tun- 



bridge Wells 

 Fragilariace.i 



Fragilaria capucina, Desmaz. 

 Shoreham 



— gibba, Ehr. Tunbridge 



Wells 



— pectinalis, Lyngb. Tun- 



bridge Wells 



— virescens, Ralfs. Tunbridge 



Wells 

 Synedra affinis, Kiitz. Pem- 



bury 

 - Ulna, Ehr. Shoreham, 

 Speld hurst 

 Striatellaceje 

 Tabellaria fenestrata, Kiitz. 

 Tunbridge Wells 



— flocculosa, Kiitz. Tun- 



bridge Wells 



73 



EuNOTIACEjE 



Pseudeunotia lunaris, Grun. 

 Lamberhurst, Goudhurst 

 Biddulphiace.'e 



DenticeUa rhombus, Ehr. Folke- 

 stone 



Triceratium alternans, Breb. 

 Folkestone 



— favus, Ehr. Folkestone 



— spinosum. Bail. Folkestone 



— striolatum, Ehr. Folkestone 



MeLOSIRACEjE 



Lysigonium varians, De Toni. 



Shoreham, Tunbridge Wells 

 Melosira arenaria, Moore. 



Shoreham, Westerham 



DESMIDIACE^ 

 Arthrodesmus convergens, Ehr. 



Rusthall Common 

 Closterium Leibleinii, Kiitz. 



Rusthall Common 



— Lunula, Nitzsch. Rust- 



hall Common 



— Ralfsii, Breb. Rusthall 



Common 



— striolatum, Ehr. Kent 

 Cosmarium Botrytis, Menegh. 



Tunbridge Wells 



— margaritiferum, Menegh. 



Rusthall Common 



— pyramidatum, Breb. Rust- 



hall Common 

 Desmidium Svvartzii, C. Ag. 



Rusthall Common 

 Disphynctium quadratum, 



Hansg. Rusthall Common 

 Euastrum oblongum, Ralfs. 



Rusthall Common 



— verrucosum, Ehr. Rusthall 



Common 

 Hyalotheca dissiliens, Breb. 

 Tunbridge Wells 



— mucosa, Ehr. Tunbridge 



Wells 



Pleurotaenium TrabecuIa,Naeg. 

 Rusthall Common 



Pleurotaeniopsis Cucumis, 



Lagerh. Rusthall Com- 

 mon 



Sphaeroszosma vertebratum, 

 Ralfs. Rusthall Common 

 lO 



